★ 5

Great gym for a drop-in, got quick responses from the coaches about scheduling, Coach Marianne was great at walking through the movements and coming up with modifications as needed. Everyone in the class was very welcoming and helpful. Workout was a medley of Hero workouts - left me completely gassed. Would definitely recommend!

Source: Google

★ 5

I'm a senior woman who recently joined CrossFit Kryptonite , and I've been so impressed with both the coaching and the welcoming atmosphere. Mariana the owner and coach is patient, attentive and truly focused on proper technique. She has created a strong sense of community and I always feel supported and included. I highly recommend this gym to anyone looking to be in better shape, stronger, and that offers a warm, positive environment.

Source: Google

★ 5

The coaches actually pay attention — correcting form, pushing you safely, and helping you hit levels you didn’t even know you had.

The people are what make it special. The community is supportive, positive, and welcoming. Someone is always cheering you on, even if they just met you that day. You feel like you’re part of a team, not just a gym membership.

Clean space, great equipment, amazing atmosphere, and real results.

Source: Google

★ 5

CrossFit Kryptonite has quickly become one of my favorite places to be. From the moment I walked in, the atmosphere was warm, welcoming, and full of positive energy. The people here are incredibly kind, supportive, and genuinely excited to see you succeed.

I want to give a special shout out to Mariana who has made my experience exceptional. She has a true gift for coaching. Her ability to break down movements, offer helpful techniques, and guide you on how to improve your form is outstanding. I love how she pays attention to the small details that make a big difference in the workout. Her encouragement keeps me motivated and her expertise helps me push myself in the right way.
I truly enjoy coming to CrossFit Kryptonite and I am grateful for such a great community and an incredible coach. If you want a place where you feel welcomed, challenged, and supported this is it.

Source: Google

★ 5

If you’re looking for a place that feels like home, keeps you accountable, and helps you get stronger every day, this is it! 💪

Source: Google

★ 5

I am a fairly new member of Crossfit Kryptonite but have been doing crossfit for about 14 years. I tried this gym because it’s close to home and when I went to check it out I loved the energy, I couldn’t wait to come back and try a class. The programming is great, the gym is very clean but most importantly, the coaches and members are so welcoming and friendly. The coaches know their stuff and are hands on and encouraging. I have mostly been to the morning classes with Mariana who is also the owner, and she is the best! I am a new mom and after almost a year long hiatus from fitness, I’m excited to get strong again for my daughter and I’m happy I get to do that here. I’m so glad I found this gym, the classes are fun, the work outs are great and the vibe is awesome!

Source: Google

★ 5

If you’re considering CrossFit this is the one. From minute one I was made to feel right at home by both coaches and members. The workouts are challenging but can be scaled to suit your fitness level and goals, so don’t be intimidated. Both coaches and athletes are very encouraging be it before after or during the workout. Mariana is excellent and it shows that she wants to see you succeed. I’d recommend this gym to anyone who wants to take their fitness to the next level beginner and experienced gym goers alike.

Source: Google

★ 5

What a great gym! Mariana put me on track for my weight loss and fitness journey. The workouts are hard but completely doable. The atmosphere is extremely welcoming. Definitely recommend coming down for a class. So happy I’m back with the CrossFit family

Source: Google

★ 5

My son recently started at Kryptonite CrossFit and it has been such a positive experience. The coach is motivating, knowledgeable, and supportive, and the atmosphere is welcoming and encouraging. It’s amazing to see him building strength, confidence, and discipline — and actually looking forward to his workouts! We’re so happy to have found this community and highly recommend it.

Source: Google

★ 5

Dropped a couple of times in while visiting over the summer - loved the vibe, coaches and members were all super friendly!

Source: Google

★ 5

This is such a supportive place to train! Both the owner, Mariana, and the other pros who train and teach here are as well-informed and encouraging as could be!! I am officially a senior citizen (though I haven’t yet received that memo😄) with weak upper body strength, and each teacher finds the perfect balance between scaling my work-outs to my current abilities and raising the bar just enough to move me forward.

As if the teachers weren’t enough of an asset, owner Mariana has established a spirit of mutual appreciation and encouragement - every “Good job!” to each other is a win for all!

Source: Google

★ 5

Always a great experience at CrossFit Kryptonite. I’ve been dropping in here for 5 years every summer when I’m in town visiting family. The owner / coach Mariana remembers me every time and always makes me feel welcome! Great programming, welcoming members, and everything you need in a CrossFit gym. I’ll keep coming back every year, and I encourage others to check it out too!

Source: Google

★ 5

My wife and I drop into CrossFit Kryptonite every year while in town visiting family. Coach Mariana and the gym community has always been so welcoming over the years. We couldn’t imagine dropping into any other gym in the Westhampton area!

Source: Google

★ 5

I joined Kryptonite CrossFit in the beginning of May. My main goal was to incorporate more strength training into my exercise routine to slow down the process of osteoporosis and simply to become stronger. Marianna was, and continues to be knowledgeable and helpful. Although I was nervous about not knowing the exercises, specifically the barbell work, everyone from instructors to members are helpful and encouraging. I’m already noticing improvement in my strength and endurance as well as my confidence level.
It is definitely worth the time and effort.

Source: Google

★ 5

Fantastic CrossFit gym!! The facility is super clean, coaches are extremely friendly and very accommodating for athletes of all levels! Highly recommend this gym to anyone who is trying to take their health and fitness to the next level!!

Source: Google

★ 5

Mariana is one of the best trainers along with other trainers i’ve been going there since I was a teenager, no matter how long i haven’t been there. I’ll always go back. They are encouraging supportive, and the People who you work out with they are so helpful and positive the one gym you would go to and don’t feel intimidated. It’s a great atmosphere for anyone to join no matter how out of shape you are you’ll never feel alone or out of place! Everyone is like family <3

Source: Google

★ 5

One of the best experiences of my life. From the great coaching to the friendly members, Kryptonite has been my gym home for the last 10 years. I have never been in better shape or interacted with kinder nicer members. If you’re looking for a great place with great people to train with this is your spot

Source: Google

★ 5

This place is awesome. I am new to it but love it already. If you have been thinking about trying Crossfit but haven't yet, try this place. You will love it too.

Source: Google

★ 5

I use to go to planet fitness and couldn’t get into a workout routine that worked for me. I wanted something more intense and an expert trainer like (Mariana) and her team who could help me with my fitness goals. This place is just that. The atmosphere is outstanding, it feels right at home. Everyone is so compassionate and makes you feel like family. NO JUDGEMENT AT ALL. I would recommend this place to anyone!

Linda M.

Source: Google

★ 5

I have been coming to this gym for many years. I have done the regular classes and now I do the Boot Camp classes. It’s an awesome class so very comfortable with a great instructor and gym partners. I highly recommend it also very flexible and tailored to your needs.

Source: Google

★ 5

I have been at this gym since February 2017. It has enhanced my life to the degree of improved health and wellness as well as an above average fitness and physic for a middle aged man! But that's only part of the story. The rest of the story is with the community at CrossFit. The people who coach and attend can become good friends as you work out together, sharing the pain and growth from the challenges of each WOD. Crossfit Kryptonite has become part of my daily life. Through the good times and bad, we support each other as we progress towards our fitness goals.

Source: Google

★ 5

Love this gym, my Krypto Fam.

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★ 5

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★ 5

Kryptonite is my second home and my second family! Love the atmosphere and the people! And we have some of the best coaches around!!

Source: Google

★ 5

Great coaches , awsome crowd. Definitely right place to join ! Always welcoming and supportive!

Source: Google

★ 5

Crossfit Kryptonite changed the way I thought about working out and food. You don’t have to work out for 2 hours in the gym or starve yourself to get the results you want. Mariana and her coaches gave me a roadmap to lose weight and get in the best shape of my life. If you’re looking to make a positive change in your life contact CrossFit Kryptonite today!

Source: Google

★ 5

CrossFit Kryptonite is like a second home. When I first came, I didn’t know one person. Now, I know everyone. They make you feel like you’re part of a family right away, no matter your ability. Best part, NO BS and NO mirrors! Age range from teens to 60’s. I mean it when I say everyone is welcome!

Source: Google

★ 5

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★ 5

I first joined Crossfit kryptonite roughly 11 months ago, and I’ll never look back! Mariana and her staff are extremely knowledgeable and friendly making the move seamless. They are diligent to ensure correct form for our workouts to prevent injury. I’ve seen a dramatic increase in strength and appearance over the past 11 months that’s allowed me to expedite my journey in getting back into better shape. I couldn’t recommend Crossfit kryptonite more!

Source: Google

★ 5

Great environment, great workouts and great results. Whatever level you are at it’s always a challenge! Highly recommend!

Source: Google

★ 5

I have been coming to CrossFit Kryptonite for over 8 years. What keeps me coming back the quality of the coaches (especially coach Matt and the owner Mariana) and facility. The equipment is clean and maintained and the coaches ensure the class is always challenging but tailored to my needs as an athlete. If you're in Center Moriches, I cannot recommend them enough.

Source: Google

★ 5

Want to train hard and train right? This is the place you want to go to get a great workout and one on one attention with top notch coaches.

Source: Google

★ 5

CrossFit Kryptonite is hands down the best gym of any kind in Eastport, East Moriches, Center Moriches. Honestly, it is the best gym I have ever been to. The owner and head coach Mariana is exceptional. Her knowledge, personality, and ability to individually tailor her coaching to the abilities of her members is second to none. I have been with this gym since it opened and the loyalty of her coaching staff and patrons is a testament to the quality of training that goes on here. No matter your experience or skill level, I recommend this gym to anyone and everyone. Personable coaching staff, high level training quality, top tier facility, clean equipment, family atmosphere, and supportive patrons. 10/10.

Source: Google

★ 5

I’ve been a member of CrossFit Kryptonite since 2015.
Many CrossFit gyms can feel very intimidating for the average person but the coaches and members here are very welcoming and inclusive. There are challenges or modifications for all the workouts so you never feel like you don’t belong. The owner, Mariana, is very kind and thoughtful but also pushes you to reach your true potential. She has created a fitness community and shows genuine care and concern for all of her members. The other coaches are very knowledgeable and will offer help and guidance through the workouts. The workouts vary every day so you never get bored. I enjoy the feeling of accomplishment after each workout. I highly recommend Crossfit Kryptonite!

Source: Google

★ 5

I have been going to kryptonite for almost 2years now
The environment is great very welcoming
The coaches are very knowledgeable
Great community.
Would definitely recommend trying .

Source: Google

★ 5

This is my new favorite way to workout. Every class is structured and I am able to modify where needed to adjust for an injury from 25 years ago. The instructors are knowledgeable and I get in a great workout every time. The people are wonderful and it’s so empowering to see all different ages working out and doing it well. It’s been 5 months and my abilities have improved and I look forward to all the hard work paying off as I get up in age. It’s never too late.

Source: Google

★ 5

Great family atmosphere with intense wods

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★ 5

I have been going for about a year now, I love it here! Great gym! Great trainers and great people.

Source: Google

★ 5

Joined 4 years ago and it was the best decision. The coaches are the best. The classes are always different and it’s nice to workout with a group of people who motivate you to do your best. I wouldn’t go anywhere else! CrossFit kryptonite is the best!

Source: Google

★ 5

Amazing gym and members! Clean, fun and great coaching!

Source: Google

★ 5

I have been a member of CrossFit Kryptonite for 7 years. Before joining, I had been to other gyms and took many different classes. CrossFit Kryptonite is by far the best! The workouts are always different and allow everyone to work at their own level. The coaches are knowledgeable and always willing to help. I have been able to challenge myself and do things I never thought I could do. I have also seen other members/friends transform themselves and become stronger and more confident. CrossFit Kryptonite is truly a family where everyone supports, motivates, and encourages one another. It is the best decision I have ever made for my physical health.

Source: Google

★ 5

While many gyms offer functional fitness programs, they're often large classes with limited personalized guidance. At CrossFit Kryptonite, priority is placed on delivering individual attention to proper form to help you reach your fitness goals. As a physical therapist, I can attest this focus on form is crucial to avoid injury and often overlooked. At Kryptonite, Marianna and the rest of the certified CrossFit coaches will not only guide you to achieve your wellness goals, but ensure you do so expertly, providing corrections and instruction in a motivating, community-based atmosphere, regardless of your level of fitness- from "weekend warriors" to athletes. They all provide a fun, functional and fulfilling workout experience!

Source: Google

★ 5

CrossFit Kryptonite has been a big part of my life since my mom opened it in 2010. Back then, CrossFit was still in its early days and hadn't yet gained the momentum is has now. Since then, however, I've had the pleasure of watching my mom build this gym — its identity and its community — into something much larger and more important than just "a building where people do fitness."

Today, CrossFit Kryptonite is unlike all the other CrossFit gyms I've visited, dropped in at and even worked at. My mom has built it and turned it into a truly unique, supportive place with many expert coaches on staff who share her passion for changing lives. I've personally witnessed many transformative stories — people of all ages and from various walks of life who have lost weight, improved their health, gotten stronger, gained self-esteem, and found lasting friendship.

As my mom's daughter, I've also been in the unique position to witness all the hard work my mom does behind the scenes. Beyond the day-to-day administrative work, she is always looking for new ways to improve her knowledge as a coach and enhance the membership experience.

Examples include: taking additional fitness certifications; planning fun, social events outside the gym; planning events to raise money for local or charitable causes; partnering with other community venues like the LT Michael P. Murphy Navy SEAL Museum to participate in annual fitness events; partnering with other local gyms for members to enjoy friendly competition; navigating uncertainties like the COVID-19 pandemic; organizing official CrossFit events like the annual Open. The list goes on.

On a more personal note, being part of the CrossFit Kryptonite community since its infancy motivated me to pursue health and fitness more seriously in my own life. I prioritized living more healthily in how I move and in what I eat. I was also inspired to become a coach myself so that I could help others on their own fitness journeys. I received my Level 1, and even after moving outside of Long Island for a few years, the first thing I did (besides finding a place to live) was find a CrossFit gym to train and coach at.

To sum it all up, CrossFit Kryptonite is truly a labor of love, and its specialness is incomparable, palpable, and contagious. If you're reading this and are wondering whether "CrossFit" is right for you, I assure you it's so much more than whatever preconceived reputation it has gained in popular culture. Whether you're a teenager or a senior citizen, whether you're a seasoned athlete or have physical limitations, I guarantee there is no better place to get healthy — and surprise yourself in the process — than CrossFit Kryptonite.

Source: Google

★ 5

CrossFit Kryptonite is truly a gem in the world of fitness! From the moment you step through the doors, you're greeted by a welcoming community and passionate coaches who are dedicated to helping you achieve your fitness goals. The atmosphere is electric, filled with motivation and camaraderie that pushes you to give your best every time.

The workouts are expertly designed, offering a perfect blend of strength training, conditioning, and skill work that keeps things fresh and exciting. No two sessions are the same, which keeps you engaged and eager to come back. The coaches are incredibly knowledgeable and attentive, providing personalized guidance and modifications to accommodate all fitness levels.

What sets CrossFit Kryptonite apart is its sense of community. Everyone is supportive, cheering each other on, which creates an encouraging environment that makes you feel right at home. Whether you're a seasoned athlete or a beginner, you’ll find a place here.

The workouts are fantastic with a strong focus on safety and proper technique ensures that you can push your limits while minimizing the risk of injury.

Overall, CrossFit Kryptonite is more than just a gym; it's a lifestyle. If you're looking for a place to transform your fitness journey while being part of an amazing community, look no further!

Source: Google

★ 5

CrossFit Kryptonite is truly a standout fitness community! From the moment you walk in, you’re welcomed by a team of knowledgeable, encouraging, and passionate coaches who are dedicated to helping you achieve your fitness goals. The gym itself is impeccably maintained, with top-tier equipment and a layout that promotes both safety and efficiency during workouts.

The programming at CrossFit Kryptonite is thoughtfully designed to challenge athletes of all levels, from beginners to seasoned CrossFitters. Each workout strikes the perfect balance of strength, endurance, and skill-building, ensuring steady progress while keeping things exciting and dynamic. The coaches are exceptional at scaling workouts to meet individual needs, making everyone feel capable and supported.

What really sets CrossFit Kryptonite apart is its community. The camaraderie and energy are unmatched—members cheer each other on, celebrate victories together, and genuinely foster a sense of belonging. If you’re looking for a place to transform not just your fitness, but also your mindset and lifestyle, CrossFit Kryptonite is the ultimate destination. Highly recommend!

Source: Google

★ 5

When my sister and I decided to join Cross-Fit, I must say we were a little nervous. We pulled up to the gym and almost turned around! I’m glad we made the decision to walk through the door!!! We have been members for two and a half years and the results are amazing! I’m 52 and I feel like I’m in my early 20’s! The classes are great, everything is planned out from start to finish!! No more walking around the regular gym wondering what to do or waiting for a machine! Marianna and the coaches at Kryptonite are amazing! They are extremely knowledgeable, helpful, and friendly! The members are also very welcoming, encouraging and supportive!! I highly recommend this gym…..you will not regret it!

Source: Google

★ 5

Ive been going to this gym for nearly 4 years now. It such a welcoming place with a great community. The coaches are extremely knowledgeable and will teach you as much as you’re interested in learning

Source: Google

★ 5

I have never been in better shape in my life, thank you crossfit Kryptonite !!!

Source: Google

★ 5

Source: Google

★ 5

I dropped into this gym for a week and had a great experience. The gym is big, has lots of equipment, the members are very welcoming and the coaches are very accommodating to people who just want to move and feel good. I recommend this gym for anyone who wants to try CrossFit but is intimidated or turned off by the competitive or intense environments that typically goes with CrossFit.

Source: Google

★ 5

Great coaching
Mariana is focused on what’s right for each person
Very approachable for any level 👍🏻😎

Source: Google

★ 5

I love this CrossFit box, the classes makes me happy, the coaches are very good, the owner Mariana is an incredible exemple of woman, the space is big, comfortable and familiar atmosphere. Super recommend!

Source: Google

★ 5

Amazing people who encourage one another on a daily basis! Phenomenal community to be a part of!!!!

Source: Google

★ 5

Absolutely would recommend to anyone … I have struggled with my weight and self image almost my entire life … I automatically felt welcomed and accepted by Mariana, her coaches and every member.. I feel great after leaving a class it is mentally and physically cleansing ❤️

Source: Google

★ 5

This gym is the best! The coaches are knowledgeable, patient and really push you to your full potential! You’ll really feel like you’re part of a family here. All that aside, the space is super clean and they have all the equipment you could need. If you’re wondering if you should give it a try, you definitely should. Can’t beat CrossFit Kryptonite!

Source: Google

★ 5

This gym is truly one of a kind! I did a drop in class and had an amazing and intense workout. I explained an injury to the owner and coach and they provided me with an alternate exercise to do to ensure I would feel comfortable and not reinjure myself. Everyone there was super friendly and willing to help! I would definitely try another class again soon!

Source: Google

★ 5

This crossfit gym feels like my second home. If you are looking for a gym that encourages you to workout harder, all while having a family feel, this gym is for you! The owner and the coaches are amazing and super accommodating and will adjust or alter the workout to your needs if needed. Definitely recommend coming here!

Source: Google

★ 5

This CrossFit is the best The owner Mariana and her Coaches are very knowledgeable ,professional, and friendly The atmosphere is welcoming. Joining this box over 12 years ago was the best decision I have ever made

Source: Google

★ 5

I started a little over a year ago and I’m addicted. Mariana and her coaches are excellent. The family atmosphere makes it fun and we all challenge each other to do better. 💪🏻💪🏻💪🏻

Source: Google

★ 5

I love this place! Before to go to this place I never have CrossFit in the pass. Mariana taught me with patience and dedication. They make you welcome. 👌

Source: Google

★ 5

Great gym and good trainers!!

Source: Google

★ 5

Great Saturday WOD. Thanks Eldin and Don for pushing me
And Marianna as always

Source: Google

★ 5

Did a drop in class while I was in the area, and loved it!
High quality equipment, great coaching and extremely welcoming community!

Highly recommended!!

Source: Google

★ 5

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★ 5

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★ 5

I started at Crossfit Kryptonite around the middle of July. At first I would go 1-2 times a week and after about a month and a half realized I needed to be doing more. I met with one of the trainers who provided nutrition and fitness advice. Starting in the first week of October I began a clean eating journey and started going to the gym 3-4 times a week. I followed the advice of Mariana and her group of trainers and less than two months later I feel better than ever and am down about 15 pounds. The gym has great equipment, trainers and classes and has been very welcoming. It is more like a family of people pushing each other to reach their goals. I would recommend this gym to anyone looking for something new to try.

Source: Google

★ 5

Amazing place

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★ 5

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★ 5

This gym is my second home. The members are an amazing group of people to work out with. My quality of life has improved dramatically in exercise, nutrition and self care because of the discussions and instruction with the coaches. I'm 40 years old and I've never been more fit in my life. I highly recommend this gym to join or drop into.

Source: Google

★ 3

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★ 5

Best place to workout. Marianna is the best coach

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★ 5

My wife and I dropped in from GA. Very accommodating. Awesome facility. Great box!

Source: Google

★ 5

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★ 5

Their experience plus your dedication equals unlimited strength

Source: Google

★ 5

Mariana, the owner, is one of the kindest people I know. She makes u feel as if you’re part of the Xfit family.

Source: Google

★ 5

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★ 5

Excellent gym. Everyone is very friendly and willing to help. great trainers .

Source: Google

★ 5

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★ 5

Best decision I made for myself was to start coming here!!!

Source: Google

★ 5

Love this gym. My second home. Some of the best people I have met in my entire life. But, I digress. The workouts are amazing. They are interesting and effective. I feel really good afterwards. I am ready to tackle the day. I am a better person overall and have become stronger both mentally and physically.

Source: Google

★ 5

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★ 5

Great gym

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★ 5

Awesome place! Staff is helpful & a joy to be with. You def get your money's worth here. I highly recommend it, even for beginners.

Source: Google

★ 5

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★ 5

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★ 5

Great place! Nice people. Cool warehouse atmosphere. Most importantly, you will get an amazing work out there. Mariana, the owner, is a very nice person and a first - rate coach with tons of knowledge for all skill levels. I highly recommend CrossFit Kryptonite.

Source: Google