★ 5

I can’t say enough great things about this gym and the team here! I’ve had eight private sessions with Izzy, along with regularly attending the group strength classes, and this is the first time I’ve ever worked with a personal trainer consistently. She has completely raised the bar for what I expected from training.

Izzy is incredibly versatile—no two sessions are ever the same—and she has an amazing eye for identifying imbalances and creating a plan that targets exactly what you need. I feel stronger and more knowledgeable every week.

I also want to shout out Gaby, Anthony, and Chloe, who all do an excellent job leading the group strength sessions. Their coaching, energy, and attention to technique make every class both challenging and motivating.

What really sets this gym apart is their technique-first approach to weight training. The environment is positive, supportive, and always pushes you to show up as your best self.

Highly recommend to anyone looking to level up their fitness!

Source: Google

★ 5

I’ve done a couple of workouts at Onyx and honestly love the space and vibe. The equipments are top-notch, set up really well, and has everything you’d want for a good mix of training. The workouts are smartly put together – from strength days (upper, lower & full body) to HIIT and bootcamps – with warmups, sets, and reps laid out in a way that makes the hour fly by without feeling rushed. Coaches are super welcoming, humble, and great at what they do – shoutout to Anthony, Izzy, and Gaby! Onyx isn’t just a gym, it’s a spot you actually look forward to coming back to.

Source: Google

★ 5

I’m so impressed with this new gym! The space is spotless, the equipment is top-of-the-line, and the trainers are both knowledgeable and approachable. It’s been such a pleasure to see the head trainer—who I knew from my old gym—really blossom in his new role here. You can tell he genuinely cares about his clients’ progress, and the whole team brings great energy and professionalism. Highly recommend this place to anyone looking for a clean, modern gym with outstanding guidance!

Source: Google

★ 5

I don’t wanna say how much I love this place because it’s a new hidden gem but everyone needs to go!!! Such a good hour workout with all the trainers !! Keep it up guys ! Xo.

Source: Google

★ 5

Best gym in Detroit!! They offer a variety of classes, and the trainers couldn’t be more welcoming and encouraging. They’re always there to help with form and keep the energy high. The equipment is top-notch and the space is spotless. Highly recommend checking them out!

Source: Google

★ 5

The best gym in Detroit!! Amazing workouts and great trainers! They’ll always correct your form if needed and hype you up to get you through a tough session. My favorite thing to do on Saturday is go to a workout then shop around eastern market!

Source: Google

★ 5

Love the classes and working with the coaches at Onyx! The workouts are fun and they are always there to help you get better. Izzy makes 5 am workouts worth it!

Source: Google

★ 5

One of the best things to come to Eastern Market. Onyx is such a warm and embracing place. The classes make you WORK and the trainers make sure you still stay up, while giving plenty of room to rest. You are guaranteed to get a great workout, everytime. I also love the flexibility in that you can go as much or as little as you want. I go every Saturday morning and get a KILLER workout. You should too!

Source: Google

★ 5

10/10 studio. Its a vibe, I already am seeing results, and love the location.

Source: Google

★ 5

can’t say enough great things about this gym! The equipment is top-notch, always clean, and well-maintained. The staff is incredibly friendly, knowledgeable, and genuinely invested in helping members reach their goals. I always get an amazing work out with a lot of variety. The atmosphere is motivating without being intimidating, and there’s a real sense of community here. Whether you’re lifting heavy, taking a class, or just starting your fitness journey, this place has everything you need. Easily the best gym experience I’ve ever had!

Source: Google

★ 5

Absolutely love Onyx! Coach Bri is amazing and the classes are challenging but so worth it! I love my progress!

Source: Google

★ 5

Great Gym, love the workout times, location, and staff. The schedule is perfect for my life.

Source: Google

★ 5

I visited Onyx this past Tuesday and it was absolutely amazing! Gabby was awesome and very motivating. The gym is located near eastern market and the facility is nice. Building is protected by a door code which felt safe. The workout was intense, but in a good way. Definitely recommend and I’ll be back!

Source: Google

★ 5

The coolest gym I’ve been to in Detroit. Classes are challenging but fun, and the sounds system is great! All very nice equipment which makes my weekly HIIT class that much better.

Source: Google

★ 5

Inviting space in a fun downtown location. Trainers and coaches are friendly and knowledgeable. Place is a "must-go" for anyone looking to either take a step up in their fitness journey, or even their first step towards a better version of themselves. I'm right in the middle personally, so it's perfect for me!

Source: Google

★ 5

Loved the lower body strength day! They explain the exercises so well and you go at your own pace. Love it!

Source: Google

★ 5

Love this gym! All the coaches and members have great energy and are very welcoming. The staff is knowledgeable and always available to help with adjustments and/or modifications. Always enjoy my classes here!

Source: Google

★ 5

Nothing but incredible things to say about the classes, coaches and community being built at Onyx! The classes are always a great workout, with a mix of focuses (upper, lower, full body and HIIT) throughout the week so you can tailor your visits with your goals. Their schedule is honestly unmatched locally with classes from early morning through evening so even if you have to adjust to accommodate your schedule, you can get a great workout, in line with your overall training plan. Love all my sessions and have to shout out Anthony, Izzy, Gaby, Terry and Emily for the great workouts they’ve run — each one is excellent at explaining the workouts, providing feedback as we go and also offering alternatives to work around injuries. Honestly cannot recommend them highly enough!

Source: Google

★ 5

Really like this gym! Classes are great, trainers are super friendly and always ready to help with anything.

Source: Google

★ 5

Gaby is a grade A + + + coach. She breaks you down in the best way possible and lifts you up to hold a better you all in one class. IT GETS BETTER though because you can spend 8 weeks, one day a week so eight days total with Gaby. You’ll come out of those eight weeks feeling stronger and like a total baddie. I couldn’t recommend a better coach and the Onyx Athletic Club has all the workout tools and resources available which is stellar.

Source: Google

★ 5

I’ve been jumping from gym to gym since 2013 and I finally found the one that feels like home. The perfect mix of strength training, cardio, full body, upper body, lower body, HIIT, and bootcamp-style workouts. For the first time ever, I don’t feel like I’m forcing myself to go. I actually want to show up, put in the work, and keep getting stronger. The vibe is unmatched, the trainers are amazing, and it’s an easy 10/10 for atmosphere and cleanliness. Everything about this gym truly is great. In my favorite city too!! Safe to say I finally found the gym that has everything I need, I know I’m here to stay!

Source: Google

★ 5

I’ve loved the classes at Onyx so far! I hadn’t lifted heavy in a long time and was a bit intimidated, but all of the trainers are super helpful :)

Source: Google

★ 5

Clean space, high-quality equipment, and a serious vibe that pushes you to work harder. Coaches are welcoming and the energy is always on point. One of my new favorite gyms in Detroit!

Source: Google

★ 5

Source: Google