★ 5

went to my first class last week and loved it - the coaches are great, and the class was far more challenging than expected. will certainly be back.

Source: Google

★ 5

Literally chose my neighborhood to be close to Duality - such an amazing studio, community, and workout!

Source: Google

★ 5

Duality is simply incredible and has meant a lot to me over the past few years since I started going. Jen, Tim, and Nattiel have created a space and a community that has always been welcoming, positive, and safe in addition to being the 'hardest workout in Denver'. All of the coaches are phenomenal and bring the energy each and every class. A very sincere thank you to the team that has made Duality a special place that has given me so much.

Source: Google

★ 5

Duality is all the hype! The owners build a sense of community like no other HIIT class groups in Denver. Love what they’re doing with West Colfax—-creating a wellness collective right where it’s needed. Their rooftop yoga classes are second to none. They interweave their love/calling for fostering doggies into every aspect of Duality. Truly a North Star place!

Source: Google

★ 3

Overall the workout was great, I just didn’t feel a strong sense of community or empowerment with the other women or the coach as I have with other establishments that offer similar classes. Everyone was very standoffish. Also the music is just so bad..I know this might not be something that the coaches can fully control but it is really bad.

Source: Google

★ 5

I was traveling for work and looking for a workout class, I stumbled upon Duality. I took the Rescon class, it was challenging and fun! The owners are super nice, they are building a great wellness community there. If I lived in Denver I would definitely be a member!

Source: Google

★ 5

Source: Google

★ 5

Duality is my favorite fitness studio, between circuit HIIT, strength classes, heated rescon, and restorative yoga, I could (and often do!) come here everyday for an hour of self care 🧘‍♀️✨I love the speciality classes, especially the *free* summer rooftop yoga classes and HIIT in the park. And there’s almost always puppies at the studio!? ‘Nough said. 🌟

Source: Google

★ 5

Source: Google

★ 5

5/2025Editing to add - it’s been almost a year and I still live coming 3-5x/ week. I just did rooftop sunset yoga (with puppies!🐶) last Thursday and that was tons of fun too! Thanks for still being awesome Duality.

——
8/2024
I joined in June ana have enjoyed coming here 3-5x/week since then. There are a lot of class times to choose from. I appreciate all the early hours for workouts before getting the kids to school. I do circuit more than rescon (mostly bc I prefer the cooler room and weights in circuit). Instructors are inclusive and welcoming.

Source: Google

★ 5

Fabulous place to workout! I've been coming here for 4+ years, first as a classpasser then as a member, and love the diversity of classes. I appreciate that I can split my workouts between strength/heavy lifting, hot yoga, and more HIIT style throughout the week. The prices are on par with other studios in the area, but there are often specials going on to make it more affordable.

Source: Google

★ 5

Duality is easily my favorite gym in Denver. I started out on ClassPass but shortly after got a membership since it was the only gym I used my credits on.

All Duality coaches are incredible and the community aspect is so fun. There’s specialty classes every month and so many social events happening to give you the opportunity to meet new people. I can’t say enough good things about this place.

Source: Google

★ 5

I started going to Duality about 1.5 months ago and it has easily been one of the best fitness classes I have been to! I’ve done all sorts of workout classes (OTF - where I also worked for a few years, solidcore, soul cycle, etc) over the years and Duality is unmatched.

Below are a few things I love:

1) The schedule. I work incredibly long and odd hours as an emergency veterinarian but Duality offers a wide range of classes where I can almost always find a class time that works for my forever changing schedule. Additionally, the showers are clean and have shampoo/conditioner/body wash/ lotion/ spray deodorant provided (makes packing prior to work a lot easier if I have to shower at the studio). Lastly, despite being on Colfax I have never had an issue with parking whether its a 5am class or early/late afternoon.

2) The community. I am a little more quiet when I go to class as a newbie but I can tell the instructors love what they do (I see them taking classes themselves often). I also see a lot of the members supporting each other through classes, so even though I keep to myself I feel included. The owner Jen is so kind and I love taking her classes when I can (she makes you feel important and you can tell she is passionate about what she does). Additionally, I went to Side Pony after class today for the first time to grab a coffee and Tim (another one of the owners of both establishments) was working behind the counter. He was a delight to chat with and there was even another member grabbing a coffee after class who shared some small talk with me! While it seems like a small thing, it made my day.

3) The variety. I mostly go to the circuit classes (as I prefer assigned stations and the cooler atmosphere) and everyday is different with its own challenges. I always come out feeling strong and sweaty - my fitness goals are to shed fat and build lean muscle and I feel the workouts align with those goals as it is a great mix of cardio and strength training. I love having HIIT focused classes, as well as upper and lower body focused days for the circuit classes. I have only been to one ResCon class and it made me see the light. I definitely wanna do more ResCon classes though (I just get FOMO about the Circuit classes haha). The variety also makes it a sustainable work-out class long-term where getting bored with the workouts doesn’t seem like an option.

4) The timing. I was skeptical about classes only being 45 minutes but it is the PERFECT amount of time to push yourself. There is also very minimal down time during the workouts so you are truly working hard for a good 35-40 minutes of the circuit class time (as the remaining time is used for warming-up and a quick transition from the tread side to the rower side). For ResCon, you are working the whole time and you take self led water breaks as needed. The weekends provide 60 minute classes, though if you want a little bit extra.

Below are a few things I dislike:

1) Nothing.

Source: Google

★ 5

Love this studio so much! The instructors have great energy and I always get a good sweat!

Source: Google

★ 5

Source: Google

★ 5

I’ve been going to duality for almost 4 years. Circuit is my favorite class format, but have taken flow and rescon as well. My favorite circuit coaches are Katy, Taylor, Arkady, Brooks, Tim, and Reagan. My favorite flow Teachers are Tim, Sydney, Jenna, Helen, and Amy. Rescon favorites are Anne, Tasha, and Taylor. But you really can’t go wrong with ANY instructor. They are all fantastic. I’ve taken from 42!!!

Source: Google

★ 5

I can't say enough good things about Duality! If you're looking for a fantastic hot yoga studio with amazing energy and a true sense of community, look no further.

My favorite hot yoga instructor is Tim. His classes are both challenging and deeply restorative. Tim's teaching style is empowering -- he encourages you to listen to your body, offers clear instructions, and creates such a motivating environment that you feel both grounded and inspired by the end of class. The heat makes the stretches deeper and the detoxification real, and Tim's energy is the perfect complement to it all. Plus, he is constantly try to push adoptable puppies on you.

But what truly sets Duality apart is the amazing community. It's a space where you immediately feel supported and connected, whether you're a first-timer or a seasoned yogi. The vibe is always positive and inclusive, and everyone I've met is so kind and welcoming. It's a true "feel-good" environment that keeps you coming back for more.

And to top it all off, right next door is Side Pony Coffee, which is the perfect post-class treat! Whether you're in the mood for a rich coffee, wholesome snack, or you enjoy a cocktail right after morning yoga, it's the ideal way to wind down after a challenging class. It's the perfect little hangout spot to relax and enjoy some time with fellow yogis after class.

If you're looking for an exceptional yoga experience with an outstanding instructor and a wonderful community, Duality is a must-visit. I leave every class feeling rejuvenated, both physically and mentally, and I can't wait for the next week's session as it has become my Sunday morning ritual. Namaste!

Source: Google

★ 5

The absolute best! Rescon and circuit are part of my weekly confidence boost!

Source: Google

★ 5

My favorite gym forever! I wouldn’t be as strong and fast as I am without their killer workouts and amazing coaches

Source: Google

★ 5

Source: Google

★ 5

Duality is seriously the best gym in Denver! Such a great community to be apart of and could not recommend more!

Source: Google

★ 5

Hardest but guaranteed most rewarding workout in Denver - with the best community to match. Always feel better leaving than when I did walking in. Definitely try Duality if you're looking for a good sweat, good people, and good vibes!

Source: Google

★ 5

I’ve been doing group fitness classes for years and I always seem to get bored with different gyms I’ve been to. I have yet to feel this way about duality. The classes and instructors are great, would highly recommend!

Source: Google

★ 5

Great space and amazing instructors!

Source: Google

★ 5

Duality is the best! If you’re looking for a gym that will challenge you and provide variety in your workouts with super supportive and kind coaches, this is the place for you! Cute puppies in the lobby to pet is a big bonus too :) Taking a class always makes my day better. Thanks Duality!

Source: Google

★ 5

Been a member for more than 2 years and it's awesome. One of the best HIIT studios you will find not only in Denver, but anywhere. I've never done the same workout twice -- which I love. The variety and friendliness of the coaches along with awesome workout tips make this the place to be. 5/5 stars!

Source: Google

★ 5

I can go to any teacher, they all are challenging and fun! Such a freindly atmosphere. I am happy to be a member of this community!

Source: Google

★ 5

Duality has incredible coaches, challenging workouts that they continue to adapt over time, and an incredible community. They also actively seek out feedback from members on how to improve which I always appreciated from a business.

Source: Google

★ 5

Looking for variety in your workouts? Challenging formats in a welcoming environment? Then Duality is for YOU! I've been going to Duality for a couple of years now and I love it because I feel like I have 3 different gym memberships all in one. I've never been bored or burnt out because along with the different formats, they are always incorporating new exercises and challenges and all of the coaches offer their own unique vibes, music, coaching style. Give it a try! First class is free and they are on classpass :)

Source: Google

★ 5

I joined this studio a few months ago and have loved it! All the instructors and staff are super nice and make you feel welcome. They are never pushy trying to sell memberships and packages, in fact I had to ask to become a member! There’s a wide variety of class times and I’m able to get into most classes without a waitlist. There hasn’t been an instructor I haven’t enjoyed! I love Keira’s rescon class and Callie’s flow class!

Source: Google

★ 5

Duality has the best coaches and the best overall options for really working your body out. I feel honored and privileged to be a part of this community. Thank you for helping me drop the baby weight!!

Source: Google

★ 5

The Duality is my neighbourhood gym which is owned by an amazing couple and their friend. They did a stellar job building a physical space combining three different types of exercise incl. circuit, HIIT, and hot yoga. I started going to this gym as it was closest one to my house. However, I really liked the classes, instructors and other members. I am cancer patient in remission with lots of health and capability issues. None of the instructors do not see me as a burden to their class and come up with modifications tailored to my needs. They are also extremely supportive and kind towards my journey. The gym(equipment and workout space) and the common space(bathrooms & locker area) are clean and welcoming.

Source: Google

★ 5

Great workouts and instructors! Really appreciate that for each of my first type of classes the instructors talked through what to expect and where to get any equipment. Definitely recommend this studio!

Source: Google

★ 5

I was on ClassPass for years, looking for the right class-based gym community for me. A year in, I know I made the right choice in Duality. Supportive community, extensive schedule, and consistently the best use of 45 minutes in Denver across instructors and formats! Highly recommend.

Source: Google

★ 5

My absolute favorite fitness studio in Denver! I found Duality through class pass and immediately fell in love. Every instructor is fabulous and no class is the same! I have fallen in love with working out again!!!

Source: Google

★ 5

I tried Duality on class pass and liked it so much I ended up joining as a member. There are 3 primary class formats, and all offer a unique and challenging workout. All the coaches are great and knowledgeable. Great gym!

Source: Google

★ 5

I can’t say enough good things about Duality! This small business is a true gem in our community, offering a welcoming and inclusive atmosphere where everyone feels valued. The staff goes above and beyond to create a non-judgmental environment that makes working out not just a task, but an enjoyable experience.

Their workout options are fantastic! The HIIT/Circuit classes are a killer way to get your heart pumping and build strength, while the Heated Yoga sessions offer a perfect balance of intensity and relaxation. But the highlight has to be the Hot Bootcamp, affectionately dubbed “Rescon.” It’s a challenging and dynamic workout that pushes you to your limits in the best way possible!

I also love when they do themed classes, one of them for example was “Booty Bands & Beyoncé.” Who wouldn’t want to work out while grooving to some iconic tunes? The gym is always clean, and the fun challenges they host keep the motivation high. Plus, during the summer, their free outdoor workouts are a fantastic way to connect with the community while enjoying some fresh air.

If you’re looking for a gym that supports local fitness enthusiasts and makes you feel at home, look no further than Duality. It’s not just a place to work out; it’s a community. Highly recommended!

Source: Google

★ 5

I’ve been attending Duality for a few months, and it’s been a great experience. The circuit classes strike the perfect balance of challenge, and the trainers do an excellent job of adjusting the workouts to your fitness level. Each session brings variety, so you never get bored, and the atmosphere is always motivating and supportive.

What really stands out is the sense of community—everyone encourages each other, making it easy to stay consistent. If you’re looking for a place that helps you push yourself while still feeling supported, I highly recommend Duality. It’s exactly what I’ve been looking for!

Source: Google

★ 5

The best workout classes I’ve ever done! From the amazing instructors, classes that kick your butt every single time to the fun community events, I truly can’t say enough about how great Duality is!

Source: Google

★ 5

I joined Duality this July, one of my favorite instructors had told me about this place and it was everything she said and more. I was searching for a great work out and more importantly a sense of community. All of those are at duality!

Source: Google

★ 5

best studio in denver!

Source: Google

★ 3

I took a circuit class with Duality today through class pass. The class is only 45 minutes long and the format was extremely confusing. I am a regular at Orange Theory and the class seemed to try to mimic Orange Theory quite a bit, even going as far as using some of the lingo orange theory uses, except I burned only a third of the calories I burn in an Orange Theory class. I have taken a lot of group fitness classes, but found this one to be boring. The equipment is nice and the space is nice, but overall, I was pretty unimpressed. I only took one class, so, I am basing these judgments off of one class, but I certainly wouldn’t go back.

Source: Google

★ 5

They try to kill you here, but they do it with grace and kindness. This gym is awesome. Circuit is top tier and their rooftop yoga is fun. 10/10 would recommend if you want to sweat (a lot) and have a good time.

Source: Google

★ 5

Hands down my favorite gym in Denver!! I love the circuit and rescon workouts (I am not much of a yoga gal but my husband loves the yoga too) and they keep playlists and workouts spicy! Such a great way to keep workouts interesting and I never get board. I also love how encouraging the coaches are, keeps me coming back every week!

Source: Google

★ 5

Duality is my absolute FAVORITE workout studio in Denver. I’ve been a member for over 2 years and can easily say I’ve found more than just a good workout here. I keep coming back not only for the killer workouts, but for the community and for the amazing people I’ve met. The coaches are guaranteed to push you, with their positive affirmations and amazing music. 10/10 would recommend to anyone looking to try a new workout or if you want to push yourself even further!

Source: Google

★ 5

Source: Google

★ 5

Amazing experience! The energy in this studio is contagious, and it's all thanks to the incredible instructor team and the passionate owner, Jen.

First off, let me give a huge shoutout to my incredible instructor! JEN! Her dedication to her craft is truly inspiring. Every class she leads is filled with enthusiasm, motivation, and just the right amount of challenge and always explanation with execution. Jen sees everyone in the room and is fantastic about connecting on an individual basis. She has this incredible ability to push you to your limits while also making you feel supported and encouraged every step of the way.

Jen, the owner, deserves all the praise in the world. Not only has she created a beautiful and welcoming space for her staff to work out in, but she's also built a community unlike any other. Jen's passion for fitness and helping others shines through in everything she does. She's always there to greet you with a smile, offer words of encouragement, and make you feel like part of the Duality family.

Overall, I can't recommend Duality enough. Whether you're a fitness newbie or a seasoned pro, this studio has something for everyone. Thank you to the fabulous Jen for creating such an amazing fitness experience and to the experienced team at Duality.

Source: Google

★ 5

I LOVED my first class I took last night, taught by Jordan. High energy, great playlist, fast paced and challenging. I enjoyed the circuit training and mix of cardio and strength. I will definitely be back!

Source: Google

★ 5

I can’t say enough good things about Duality. I started going in October 2023 and have been hooked since. For years I struggled with consistency during the winter months because my only forms of exercise were running and cycling. I was scared to even touch weights. Duality has pushed me out of my comfort zone and kept me consistent. The unique part of Duality is the three types of workouts they offer, it’s so nice to be able to go to the same gym for Circuit and Yoga. The monthly membership is not cheap but for what you get it is well worth it. The workouts are challenging and I always leave feeling accomplished. The coaches are all so amazing and I think the people here are part of the reason why this gym is so great. It was really scary for me going from a cardio only workout plan to training with weights. At first I was totally out of my comfort zone and was nervous about being judged or embarrassing myself. I never have felt judged when I didn’t do a move correctly or when I need to ask the coach to show me how to do something again. This place is truly amazing.

Source: Google

★ 5

Source: Google

★ 5

The circuit classes kick my butt every time! There is no way I could get a workout this sweat-inducing on my own. The dark, colorful lighting, the fun instructor-dependent playlists, the wide array of movements included in the circuits— I love these classes. All the instructors and fellow gym goers are friendly, encouraging, and welcoming. I can’t recommend this gym enough!

Source: Google

★ 5

Anne is just the best! She is positive, encouraging, her classes are well attended but not too crowded, and she gets the best version out of you…highly recommend!

Source: Google

★ 5

I’ve been going to Duality on/off for about two years. After my prior gym never got its regular scheduling back after 2020/21, it took me a long time to find a new workout space I loved. Duality is truly the best. The programming is excellent, the trainers are all fun, encouraging, and make sure everyone is lifting safely, and the facility is well-managed, clean, and inviting. It’s also super fun that the owners opened a coffee shop/cocktail bar next door (Side Pony) which has helped me meet people and is very convenient for after class! This isn’t just another workout- it is carefully created programming that is always a little different so always engaging. I prefer Circuit classes with Katy who has been so welcoming- always saying hi to everyone and engaging regulars and new members in every class. She has been patient with me through an injury and helped me find ways to still get in a great workout!! ResCon is an amazing low impact workout, too. I have always been particular with the types of workouts I do and balance with other forms of exercise, and Duality is something I look forward to every week!! Thank you guys!!

Source: Google

★ 5

Would recommend this gym to anyone looking to improve their fitness journey! The instructors push you and encourage you to not just show up but truly maximize your time at Duality. Plus I love being able to mix up lighter weight strength training classes with heavier weight & cardio HIIT classes. Definitely checkout Duality for a killer workout and strong sense of community!

Source: Google

★ 5

Favorite gym in Denver!! Great instructors and I love the variety of classes and every class is different so you’re always on your toes!

Source: Google

★ 5

Duality is the first workout studio I’ve found that truly works for me and keeps me coming back! It only took one class for me to know that I wanted a membership. Before Duality I struggled to find the motivation to workout on my own, now I’m taking classes 4-5 times a week and loving it!!! There is a variety of classes and so many amazing coaches, and the app makes it super easy to sign up and schedule for the week!

Source: Google

★ 5

The best fitness studio in Denver! Can’t recommend this place enough.

Source: Google

★ 5

Best HIIT classes in Denver! Definitely a transformative and fun experience for the few months I’ve been here. The best work perk too when working next door at Side Pony!

Source: Google

★ 5

5/5 I recommend! This is a fantastic studio with coaches that care and a community that is so welcoming. The classes offered are amazing, and they offer something for everyone at every level. From heated sculpted rescon to weighted circuit to a power flow, you won't be disappointed. I was an avid Corepower gal for 8 years and 2K classes under my belt. I took my first Duality class about a year ago and have not looked back!!! If you're thinking about trying it out, just DO IT! You will not be disappointed.

Source: Google

★ 5

I love duality! My favorite gym in denver. I’ve been a member for over 2 years. All of the class options are great. The coaches are high energy and helpful! I especially love rescon 6am classes. Best way to start my day.

Source: Google

★ 5

I can't say enough good things about Duality! I’ve been going to Duality since they opened and am a member. From the moment I walked in, I felt like part of a supportive fitness family. The coaches are not only knowledgeable and skilled, but they are genuinely invested in helping you hit your goals while having fun. I don't think I can ever move back to the east coast because I won't have my Duality classes!

Now, let's talk classes! Duality offers an incredible variety to keep you engaged and excited. Whether you're up for a challenging ResCon session, an intense Circuit class, or a rejuvenating Yoga experience, there's always something for every mood and body.

What truly sets Duality apart is the amazing community they've built. I've tried other gyms in Denver, but none compare to the positive and uplifting atmosphere at Duality. No matter your fitness level, you'll be greeted with open arms and made to feel comfortable and included.

If you're looking for more than just a gym, but a place that feels like a second family and provides unwavering support, Duality is the place to be. Get ready for some serious fun on your fitness journey, because this place truly knows how to make fitness enjoyable! Jen, Nattiel, and Tim have created a remarkable environment that cultivates a sense of inclusivity, strength, and fearlessness like no other.

Source: Google

★ 5

I love Duality so much!! I have done 250 classes and there hasn’t been a single workout that hasn’t kicked my butt. The workouts are killer, the coaches are awesome and the music is always on point. Everyone is so welcoming and friendly and the coaches are always so helpful. I also love that after class you can pop next door for a coffee or a cocktail!

Source: Google

★ 5

Duality is by far my favorite gym! No class is the same and the coaches are amazing!

Source: Google

★ 5

I joined Duality about 5 months ago and was greeted with open arms. The community, exercise options, and space are nothing short of amazing. No matter which class/instructor you are going to, you’re getting an unbelievable workout with kind and motivating individuals surrounding you. I’m so glad to have found a new workout home!

Source: Google

★ 5

Love the community and workouts are fun + build your strength in a supportive, challenging way! Started by going on class pass and now have a monthly membership. I look forward to going almost everyday.

Source: Google

★ 5

The best gym I have been to -EVER! Full body workout, gets you sweating and your heart rate up. If you’re feeling like slowing down they have hot yoga and rescon (talk about bang for your buck!). Coaches are awesome and the community is incredible.

Source: Google

★ 5

Joined in May and obsessed! Every friend I bring loves it! It’s like the best of F45 & corepower in one! Staff is great.

Source: Google

★ 5

I joined Duality this year and have attended 50+ classes so far with over 15 different coaches/trainers and I love this gym! I have thoroughly enjoyed each class whether it be Flow/Yoga, Circuit Training or ResCon. Everyone is so helpful and there is a very wide variety of new and existing members. It's very easy to meet people and the atmosphere is very welcoming.

5 out of 5 Starts - I would recommend Duality to any of my friends or family members.

Source: Google

★ 5

My favorite studio ever!! Best coaches, best classes, real results!

Source: Google

★ 5

I love this gym! The classes are challenging and super fun and have good options for different workouts. The vibe of the gym with the colorful lights is really cool. Everyone is very welcoming and it feels like a community.

Source: Google

★ 5

Love this place -- the classes, coaches, and community are unmatched. I love switching things up between the three class types: circuit, rescon, and yoga. Been a member for 2.5 years and there's nowhere else I would rather spend my fitness hours.

Source: Google

★ 5

Hardest athlete workout in town!

Source: Google

★ 5

Duality is the best gym in Denver!!! I am obsessed! The atmosphere is unmatched, the coaches are the best in the business. Every class challenges me mentally and physically and I leave feeling stronger every time. Post workout, get the Protein Latte at Side Pony and Compression Sleeves at Original Glam, I promise you won’t regret!

Source: Google

★ 5

I started going to Duality 2 years ago through ClassPass but quickly joined as a member. Duality offers 3 class formats and all 3 are perfect in their own way. No matter what class you take, you are guaranteed to get a HARD workout in, surrounded by positive and encouraging people, all while jamming out. I love this gym for the workouts, but the thing I didn’t expect was the amazing community that would come along with it. From my first class, the owners and employees (coaches and front desk) have made me feel at home and so welcomed. The coaches make note to learn your name and learn how they can encourage and push you in class. The duality community also hosts so many fun events like rooftop yoga, park classes, trivia night at side pony, etc. This gym and community is so great that I even enjoy working out at 5am. If you’re looking for a gym that is also an amazing community than this is the one for you!

Source: Google

★ 5

I have been going to Duality for over two years now and love it more than ever. You have access to 3 different formats, and the workouts are never the same and always challenging. The coaches and community are also top notch. I cant recommend Duality enough!

Source: Google

★ 5

Duality is truly the best! I have been with Duality for several months. The workouts continue to be challenging both mentally and physically! I highly recommend trying a class at Duality if you want to be both challenged and motivated (the coaches are all amazing)!

Source: Google

★ 5

Duality is my favorite gym in denver! The coaches are amazing, the classes are so hard and rewarding! Rescon is my favorite but I love switching it up to circuit! I’m almost to 100 classes and can’t wait for the next 100!

Source: Google

★ 5

Favorite gym in Denver! Best community, best teachers, best workouts! I always leave sweating, happy, and ready to take on the day. I absolutely love this gym and wouldn't sweat anywhere else!

Source: Google

★ 5

Challenging & fun. This workout is incredibly difficult but addictive. Great coaches, good classes, and nice studio

Source: Google

★ 5

I love Duality!! After doing CrossFit for 5 years and taking a break. I needed a change and Duality was the answer. They have a variety of classes and times to fit everyone’s needs. All the coaches are amazing and knowledgeable.

Source: Google

★ 5

Such a great workout and love all the instructors here! One of the best workout studios in denver.

Source: Google

★ 5

I just joined Duality and can say I’ve had the best experience taking classes here over the last few weeks! The instructors are so motivating and knowledgeable, and I love having three different class options. I especially love the circuit classes taught by Jamie and Katy!

Source: Google

★ 5

The best work out in Denver! I cannot recommend their Rescon classes enough. They always challenge you and leave you feeling so strong and empowered!!! 10/10

Source: Google

★ 5

Nattiel’s rescon, Arkady’s circuit, & Lindsey’s flow never disappoint. Every coach is there to support you in adjusting your alignment and modifying for your specific body. I love everything about Duality’s class formats, especially when you can finish class with compression sleeves next door at OG Glam or a latte at Side Pony. A must try gym in Denver!

Source: Google

★ 5

Couldn’t recommend Duality more. Amazing coaches and owners and the best sweaty workouts around! No two classes are the same regardless of the class format you choose. If you’re thinking about trying it out… DO IT!

Source: Google

★ 5

Source: Google

★ 5

I highly recommend Duality to anyone that loves a hard workout, a great community, amazing coaches and... puppies! Truly can't go wrong!

Source: Google

★ 5

When I moved from Scottsdale to Denver I was worried I wouldn’t find a gym I loved as much as my old gym. Then I found duality! I truly love it so much! Not only are all three workouts fun but challenging, they have built a great community. I always feel very welcome, everyone is so kind, and there is no judgement. They also do a lot of fun events and give back to the community. I highly recommend giving duality a try!

Source: Google

★ 5

I have been going to Duality for a little over a year and have been absolutely loving it! The staff is great and it is amazing that you get three different classes with your membership. I would highly recommend!!

Source: Google

★ 5

I have been a member at Duality for almost two years now and I still love every minute of it. It’s always the hardest workout class I go too and every single coach is truly amazing. Duality cares about their members and makes everyone feel welcomed.

Source: Google

★ 5

Best workout in Denver hands down. Fun people, music, and moves. Challenging and effective yet such a great time. Go take your first free class and you'll see why the Duality and Colfax Collective community is the best!

Source: Google

★ 5

Best workouts in town. Combining yoga strength and cardio. Expansion complete with a new spa and bar/coffee . I recommend this place for anybody who's fitness-minded and friendly.

Source: Google

★ 5

Great classes & great energy - sweat a lot!!!

Source: Google

★ 5

Amazing coaches! Great workouts and yoga.

Source: Google

★ 5

Duality has outstanding instructors and a welcoming community which helps create a motivating atmosphere. Overall great experience.

Source: Google

★ 5

Great community and fantastic workout classes!

Source: Google

★ 5

Great workouts with a ton of variety! I love that there classes are only 45 mins which allows you to get in and get out!

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★ 5

I’ve tried orange theory, Pilates, and a lot of other spots and IMO this is by far the best. Has become my new favorite workout! The ResCon classes are killer.

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★ 5

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★ 5

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★ 5

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★ 5

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★ 5

I’m always a little weary of group workout classes but I’ve taken two classes with Ellen and not only has the programming been well-rounded and challenging but the atmosphere is fun and encouraging without being over the top peppy or crazy like some classes can get. I love Ellen’s coaching style and appreciate that she does a good job learning everyone’s names, teaching how to use the equipment, and demonstrating the exercises before and during the class. If I lived in Denver this would be my go-to, but since I don’t I make it a point to drop in for a class when I’m around.

Source: Google

★ 5

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★ 5

I love love LOVE Duality! I have recruited four friends and counting to classes and it's hands-down my favorite work out through ClassPass. Every single class is different and I am actually seeing immense results just from 45 mins of exercise! You The instructors give awesome suggestions for adjustments (which I need almost every class 🤣). I have nothing but good things to say about this place!

Source: Google

★ 5

This is the most thorough any workout studio has been in welcoming me as a newbie. The class is hard as $@!& but was a very supportive environment. I will be back!

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★ 5

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★ 4

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★ 5

Really nice studio with updated equipment and super clean! I just took one class here while visiting a friend, it was a really fun and high energy class. If you’re looking for a challenge, definitely come here. Might be a bit intimidating if you are not at a basic level of fitness or not used to fast paced classes.

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★ 5

Its an awesome place

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★ 5

Love Duality!! All of their classes are amazing. The instructors are very knowledgeable and friendly. Highly recommend!

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★ 5

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★ 5

Tough classes, great variety, clean environment, recently renovated, instructors who will push you, a fun community aspect…everything you’d want in in a gym!

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★ 5

Duality is by far my favorite workout studio!!! & if you’re looking for an incredible workout, encouragement and kicka** music then take Anne Lindahl’s class! 10/10 instructor!!!!

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★ 5

I love working out at Duality. I have tried almost every gym within a few mile radius of myself in Denver and Duality is the one that I love the most. Their classes do not get boring, as they are constantly changing the workouts to keep members engaged. The equipment that they have is top notch and in great shape and all of the instructors are amazing with great. Highly recommend giving Duality a shot if you want to join a workout community!

Source: Google

★ 5

This place makes getting in shape so fun. The circuit workouts go by really quickly. The instructors have great energy and are very helpful at getting everyone through all the moves. I love the loud music and mood lighting. Their yoga is top notch as well. It's awesome to workout at a place with a sense of community. I'm so grateful I found them!

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★ 5

Great space, amazing workout options and an expansion that is creating a whole wellness experience.

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★ 5

I’m obsessed with these classes! The circuit is such a good workout and I love the instructors.

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★ 5

Very clean facility and challenging and unique workout classes!

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★ 5

Pretty much everything you want in a group fitness training studio - clean space, small class sizes so that instructors can coach you, knowledgeable coaches, and a ton of variations in the workouts / muscle groups worked so workouts don’t get old. Very efficient workouts and a great sweat. Also very easy to schedule classes / cancel, parking is plentiful and good sense of community there. Would recommend!

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★ 5

Love this gym

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★ 5

They run an awesome shop (with hot yoga!). Such a treat to come and focus on me and restore a couple times each month. These owners really care about who you are.

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★ 5

I love Duality! This is the best gym I've found in Denver in over 11 years. The instructors are top notch: fun and motivating (without being over the top), provide important feedback on form, and offer modifications, if needed. Every class I've been to has been challenging and different; you definitely sweat everything out. There are a variety of classes offered throughout the day so you can always find something to fit your schedule and mood. Additionally, the little things that matter: space is very clean, music is great, bathrooms are really nice, and the app is super convenient and easy to use.

Source: Google

★ 5

This is the best gym in Denver. They have great classes, plethora of class times, and qualified trainers. The owners, Jen, Nattiel, and Tim are very welcoming and friendly. Getting ahold of them is no problem, their response time is fast and communication is clear. I would recommend anyone to Duality.

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★ 5

I have never been a big gym person but this place has blown my expectations out of the water. The facilities are clean, equipment top notch, and the staff is friendly.

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★ 5

Always a great workout

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★ 5

Amazing community, welcoming coaches, so many class options, PARKING (!!) - couldn't recommend more!

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★ 5

I have been going to Duality for a little over a year and am still 100% in love with all this gym has to offer. The coaches are top notch, the classes have so much variety to offer you will never get bored or plateau, and the people that come make this place so great. If you are considering joining, give it a month and you will be so glad you did!

Source: Google

★ 5

This is my fave studio I've ever been to and is actually the only studio I've ever purchased an unlimited membership from, I love it that much. The workouts are amazing - challenging and unique but you can move at your own pace and do what's right for your body. The studio is relaxed and the instructors are cool but also super motivating and helpful (especially when you need to modify because of a recent surgery). You can really tell how passionate the instructors are, which makes all the difference. The rescon class if my fave class I've eve taken - heated, on your mat, some cardio but mostly strengthening, just so fun! And the circuit classes are amazing too, I switch back and forth. Vinyasa is amazing too, I just don't get around to those as much because I'm so addicted to how I feel after rescon and circuit, but flow is great for me on a 'rest' day.
I've been a little hesitant to write this review because I don't want to lose my spots, but I know this studio will expand in the near future or get another location because it's just that good.
First class is free - you have nothing to lose!

Source: Google

★ 5

I took my first Duality class tonight with Lauren and was totally blown away! Rescon was a great workout, the playlist was spot-on, and Lauren was a phenomenal instructor.

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★ 5

I’ve been a member at duality since aug 2021 and I’m obsessed with it! All of the instructors are awesome! They’re motivating, helpful, and push you hard. I always leave duality feeling incredible - on a total endorphin high! Love this gym and recommend it to all my friends!!

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★ 5

So thankful for this gym! They have the best workouts that will challenge you. Shout out to Jen, Tim, and Nattiel, always bringing the upbeat energy and encouragement.

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★ 5

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★ 5

Duality saved my mental health. All of their instructors are amazing in fostering a welcoming environment for everyone on their fitness journey. You will feel supported while being pushed to your limit in the most amazing way. Duality has become an ingrained part of my routine that gives physical and mental strength and I will be a member for life.

Source: Google

★ 3

Expensive, decent workout, but they don't talk about weight lifting form at all which means you don't really reap the benefits.

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★ 5

I live in Los Angeles and it goes without saying that my options for health and fitness classes are pretty much unlimited; I have access to some of the best fitness instructors in the world. Recently, I've found myself spending a lot of time in Denver and needed a place to work out. My only complaint about Duality is that I can't take this place back to LA with me; Duality blows every fitness studio I've ever been to out of the water. The classes are thoughtfully curated to be physically and mentally challenging. Jen and her instructors have a knack for pushing you to your absolute peak performance. That last rep that you think you can't possibly push yourself to do? Jen knows exactly what to say to pull two more out of you. I didn't know what my body was capable of until Duality. (Please open a studio in LA, my abs are depending on you)

Source: Google

★ 5

Great class and amazing instructor. Tons of great energy and enthusiastic coaching. The gym is beautiful with top end equipment!

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★ 5

I am picky about my workouts- fearful they will get stale- Duality is simply the best. A variety of workouts and challenging in the best way! Everyone has been so friendly and welcoming - I can’t get enough of this place!

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★ 5

Duality is by far my favorite gym in the Denver area(and period!). The coaches and owners truly care about the students and providing the best experience. Offering modifications, up levels, and mindset bombs to help you get whatever you need from the workout. I always walk out of the door feeling refreshed, re-centered, and energized. Whether it's circuit, ResCon or Yoga I can't recommend a class enough!

Source: Google

★ 5

I love working out at Duality, and the coaches and staff are always super professional and helpful!

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★ 5

I have never had a better workout experience than I do, time after time, at Duality. The community feels like a family and everyone, both teachers and other students, are consistently uplifting, encouraging, and motivating. I love the pace of class and every format - Circuit, HIIT and Flow, ResCon, or yoga - challenges me no matter the day or time of class. I feel like I leave each class a new and better version of myself and I undoubtedly get stronger each and every time. I am definitely inspired and proud of myself at the end of every sweat. I am so glad I stumbled upon this incredible community. It truly feels like a family. Highly recommend to anyone wanting a new (best) workout in Denver. Best studio I have tried yet with a variety of options for people of any level. I get to switch it up based on my mood for the day. It is a must try and SO much fun. Thanks, Duality!

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★ 5

I fell in love with this studio back in 2019 after taking my first ever HIIT/Flow class with one of the owners, Tim. Duality quickly changed the way I approached workouts and it also eventually changed my own view of my body. They have THE dopest coaches that teach you that you are more capable than you think you are and you can count on them to challenge you to reach new performance edges. I wasn’t even able to push 100lbs on the sled after my first few classes and just two years later, I’m making out at 260lb pushes. If that doesn’t invoke some serious self-pride and gratitude for your body’s capabilities, I don’t know what would. I’ve always been competitive in group classes, but this space taught me there’s benefits in slowing down. Their Flow taught me how to be present and be still. Circuit and ResCon taught me how to appreciate my abilities, but also pushed me because the next PR was always just around the corner. Both of these lessons steered me away from working out strictly for aesthetic reasons. It meant sooo much more to be strong and fast and also be capable of honoring myself and the moment. And it’s also priceless to be so supported in this space – the Duality community is like no other. For all these reasons, I’ll never leave and I’ll keep leveling up.

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★ 5

I LOVE DUALITY! It's the best workout ever! I tell everyone about Duality and encourage all to try out a class at every opportunity I get! I joined during the pandemic in spring of 2020 and absolutely loved how they kept fitness and their community alive doing live Instagram workouts and recorded sessions that I could turn to whenever I wanted. The instructors and fellow members create a positive, uplifting atmosphere for all of us to challenge ourselves and reach new heights - both in the studio and outside in the world.
I am incredibly grateful for Duality as they helped keep me happy, healthy, and centered during some of the most tumultuous times over the past year and a half. Thank you thank you thank you!!!

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★ 5

I love duality! Circuit is a great workout that switches up my routine and goes by insanely fast. I also love yoga for more restorative days. The coaches are super informative and welcoming.

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★ 5

This gym has the best instructors and community! No matter what your fitness level is, I promise you’ll not only feel challenged but welcomed as well!

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★ 5

Duality is one of a kind! The classes are challenging yet personalized so I leave feeling successful every time. The instructors and fellow students encourage and push me to my mental and physical limits — I am the strongest I have ever been since I started coming to the studio! Duality seeks for the best in people both inside and outside the space. Duality is the best fitness community I have ever been a part of!!

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★ 5

I’ve experienced a number of gyms and yoga studios in Denver, and Duality ranks at the top. The coaching/teaching team holds itself to a high standard and that’s reflected in a great experience every time. If you have yet to check this place out, quit putting off a great time.

Source: Google

★ 2

I will start by saying that this gym provides wonderful workouts and I do believe all of the instructors and coaches are kind, thoughtful people. Unfortunately, I have had a few conversations with the owner about my concerns about the insane number of people in the studio for each class. I also know that several other members and guests have mentioned this. The classes are too crowded for the space and given the dangers of COVID-19. To me it feels as though they are are more interested in making money than providing a space place to workout. I know they have told me they are following the COVID regulations, and I believe that, however you also have to use common sense. If you are bumping into the person next to you and modifying most of the moves because you are packed into a small space, the workout becomes dangerous and ineffective. I hope they make some real adjustments to their capacity soon.

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★ 5

Best place in town for HIIT workouts! This will take your fitness to a whole new level. Friendly and fun staff, top of the line equipment, and convenient location.

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★ 5

I absolutely LOVE this gym! The trainers are amazing, the workouts are hard and change every day, and the music and setting always pumps me up! plus there are so many class offerings that it makes it easy to fit it into your schedule!

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★ 5

This is one of the best studios I have been to in Denver! It is one of few that has both strength/cardio classes as well as hot yoga. It is usually hard to find that combination. I did the circuit class and it was very challenging. The instructors are also very motivating and helpful. Highly recommend!

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★ 5

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★ 5

Such an amazing gym! Coaches are all great and knowledgeable, and they have many different class options.

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★ 4

To expensive

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★ 5

Amazing staff. Great vibes. Body destruction in every class.

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★ 5

Really knowledgeable instructors, great class formats, and an awesome studio (music, layout, equipment mix, etc.). They accept ClassPass, so I definitely plan on making this part of my regular routine!

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★ 5

Used ClassPass to go to a hot yoga class and hands down one of the best studios I've visited! The instructor Danielle was so good at making you move intentionally and truthfully while guiding us through with color changing lights and my favorite kind of music. Staff was so friendly - ended up with my mat next to one of the owners, Tim and he was lovely to talk to. Lastly, I came in with some lower back aches from standing all day in steel-toed boots and left feeling AMAZING! I'll be back, Duality!

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★ 5

I have been going to Duality for a while now and it’s such a fun and good work out.
All the instructors are awesome!! I highly recommend Duality!

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★ 5

I LOVE Duality!! Top quality workouts, equipment, space, and very friendly/welcoming staff and owners. I love that I can go there for intense workouts, and also lower intensity flow classes. If you haven't tried a class here do it NOW

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★ 5

Amazing workout! Tread, rowing, circuit! Amazing equipment and amazing instruction. Can’t recommend this gym enough. Time to get fit!!

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★ 5

Best gym I've ever been to. The trainers are super helpful and push you beyond your mental and physical threshold. I love the mix of high intensity training combined with the stillness and focus of yoga. Extremely clean studio with a fun community. Highly recommended!

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★ 5

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★ 5

Couldn't speak more highly of the team at Duality. I used ClassPass for months trying out tons of studios and was hooked on Duality. Their classes are phenomenal, with no wasted time or effort during class. Most importantly, Jenn and Tim (the 2 owners) are as real as it gets. They're all about making everyone family and it goes a long way. 5 star classes, 5 star facilities, 5 star teachers and 5 star customer service. Thanks for doing your thing Duality!

Source: Google

★ 5

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★ 5

What a great boutique gym! The classes are as challenging as you make them. Uplifting and Upbeat. Everyone that works there is fantastic and you definitely feel comfortable from the moment you walk through the doors. And the best part are the two most adorable and polite Aussies that hang around the front of the studio.

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★ 5

I took my first Duality class in December and was hooked from the start! This is the first boutique fitness studio I've joined that has a mix of intense cardio/weight training AND quality yoga classes. It also helps that the owners and staff are welcoming, friendly and very easy going. If you are looking to get/stay in great shape, this is the place. Thanks Duality team!

Source: Google

★ 5

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★ 5

This place is amazing! The staff are absolutely wonderful and everyone makes you feel welcomed. If you are focusing on your cardio, athleticism, mental strength and flexibility this is the place for you. Rescon is a light weight / band cardio experience that'll get your heart pumping; if you want a hard lower body workout, this is it. The HIT classes use kettle bells, treadmills, rowing machines, bands & weights. You'll never leave feeling like you didn't push yourself. (top notch workout). And finally, their yoga classes provide everything you need to strengthen your tiny muscle fibers and brings zen to the studio. Don't think your quite up for a full HIT class? Try their HIT & Flow....30 minutes HIT, 30 minutes yoga. What a perfect balance to meet your goals!

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★ 4

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★ 5

I'm so glad this gym opened in my neighborhood of West Colfax/Sloans Lake. I love the mix of cardio, weights, and yoga. I used to have a couple different fitness memberships but Duality really is an all in one studio to get into great shape! I get such a great workout here and burn a ton of calories. Plus the studio is super nice and the staff is always warm and friendly. Highly recommend!

Source: Google

★ 5

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★ 5

The unique equipment, the lighting, the smells, good vibes, creative exercises, smiles and amazing trainers make this place uniquely different than any gym I've ever been to. Phenomenal experience. HIGHLY RECOMMENDED!

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★ 5

I discovered Duality in July with one of their free Hiit & Flow classes, and I was blown away by what an awesome workout it was! There are many boutique fitness gyms in Denver, and I feel like I have tried them all through my Class Pass membership, but this one is truly unique and fantastic! Workouts are challenging and the instructors are all super friendly and encouraging. I especially love their Circuit classes as I never push myself that hard on my own!

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★ 5

Wow! One of the best workout classes I’ve taken! I did the HIIT & Flow class and it was amazing! Both work outs complement each other! I left feeling strong and restored! I highly recommend it!

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★ 5

I cannot speak highly enough about this local, "boutique" gym! It's got an amazing blend of super intense "circuit classes"' and restorative yoga classes (plus other awesome classes that I've yet to try!) The coaches are all experts at what they do, passionate about helping each person get his/her best workout in, and all around, wonderful people! I can't recommend this place enough!! This gym is the best thing to happen to this awesome neighborhood.

Source: Google

★ 5

Duality is a truly unique workout experience! As a runner who loves spin classes, but was missing that core workout to make myself stronger, I found it in Duality. You've never experienced an incredible workout until you've done ResCon! You will be sore in places you never even KNEW you had muscles! And you will finally get those six pack abs and sexy butt doing this workout!

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★ 5

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★ 5

As a fitness junkie, I always love to check out new studios, but it’s rare for one to win me over as much as Duality has. The workouts are safe, effective, and fun! The coaches are awesome motivators while also coaching to form and alignment to ensure you get the maximum gain without injury. It’s also great to have multiple class types under one roof! Love this place already!!

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★ 5

Beautiful space and great classes!

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★ 5

Every class is amazing! It's a luxury to have heated yoga, strength conditioning and HIIT circuit classes all under one roof and with one membership. Tim, Nattiel and Jen are passionate about creating a space and accessibility for everyone. Plus, the studio itself is top of the line.

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★ 5

An extremely invigorating experience where you actual see and feel your efforts come to fruition!

The instructors are well educated through the evolution of how our bodies respond to physical activity.

They are experienced all the way around with grounding the classes through mindfulness, at the same time bringing effortless smiles through all of the sweat and challenges!

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★ 5

Incredibly challenging and high intensity resistance conditioning class! It kicked my butt! And arms. And legs. Excited for this studio to open!

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★ 5

I have taken a few of the ResCon classes and talk about a workout! I love how dynamic and energetic the class is. Excited to try out Duality’s hybrid class that does half yoga and half hiit- my ideal workout in one :) don’t miss out on this unique gym experience!

Source: Google

★ 5

I have attended a handful of Duality's RESCON classes and they are addicting!! They are my new favorite workouts, filled with great variety and enjoyment. I love the way I feel after. I've had 3 different instructors and loved each one, they do a great job of making sure your form is correct and motivating you to push your limits. Took my husband along and he loved it too. Duality offers the BEST workouts!!

Source: Google

★ 5

I recently took the ResCon class with Jen at Duality and LOVED it! The combination of weights with resistance bands was a serious workout. The playlist that Jen put together was really upbeat and kept you motivated throughout class. She also has such great energy that makes everyone in the room push a little harder than they thought possible. I was definitely feeling it the next day and look forward to the studio opening so I can take more classes.

Source: Google

★ 5

What an amazing workout! Their ResCon class uses weights and resistance bands for a one of a kind workout. You get cardio and work every muscle group you have. I have taken all of their pop-up ResCon classes and have not been disappointed. Can't wait for the studio to open! Thanks for kicking my butt - in a good way!!!

Source: Google

★ 5

I felt the BURN! After finishing my third ResCon class I am convinced this is going to take over as the only fitness studio anyone needs. Before I took my first ResCon class I was skeptical that it was just going to be Yoga with some weights. Boy was I wrong! ResCon turns it up a notch by adding resistance bands on your arms and legs (at the same time!), free weights and then they sprinkle stationary cardio into the mix giving you an insane full body workout. Jen brought the energy that was contagious while Tim was there making sure your movements were proper. He was like a ninja! Always there when you didn't know if you were doing it right.

They always talk about Duality being a safe place to struggle and the more I think about it, the more I think we can all appreciate that kind of environment. If you really want to see what you are made of I highly recommend checking this place out!

Source: Google

★ 5

I am a total beginner and I felt super supported. This class definately pushed me out of my comfort zone in a good way! Totally recommed!!

Source: Google