Amazing gym, I trained with Ibi and I have noticed a huge difference not only the way I look but my overall health. He is extremely detailed and patient. If you are looking for a PT, I highly recommend Ibi.

Great environment for classes and PT 1-2-1s, the PTs at Onyx are knowledgeable and really help in all aspects of training, pushing your limits, testing your strength, helping with any issues. Friendly atmosphere and excellent set up.

Been to a few sessions and can already tell you won't find a gym like this anywhere else in London, let alone North London... Definitely worth checking out if you're tired of the standard, stale, soulless gym atmosphere currently plaguing the city. If you're looking for a gym, or enjoyable/unique classes that will help you get fit & strong - whilst keeping you motivated, definitely hit up Onyx London.

Really great class! Adapted to suit abilities and the staff really know how to get the best from you without being overbearing. Very friendly, supportive and knowledgeable. I was dead after the session!

DId a 'SWEAT' session yesterday evening and me and my daughter loved it! Great trainer ( sorry forgot his name - 7:30 pm instructor 😁) , very knowledgeable, happy to explain exercises and very supportive! Thanks for a great session! We will definitely be back!

For anyone that’s intimidated or nervous to walk into a gym environment with Onyx you don’t need to be. With small classes, led by excellent personal trainers and friendly members you will have fun and get a great workout at the same time!

Onyx is one of a kind and so are the coaches! They are experienced, attentive and push you to be better each visit! Thank you for creating a great space!

Really nice gym with a group very experienced coaches, each with their own specialisms. I attented the Movement and Mobility class in the opening week and thoroughly enjoyed it. I’m looking forward to trying out the Functional Strength class next!

The coaches made me feel very welcome and made my experience thoroughly enjoyable! They were encouraging throughout the session and definitely push you beyond your limits!

Dropped in during the open weekend. Was warmly welcomed at reception by one of the coaches and put through my paces during a conditioning class. All the coaches were very attentive and ensured I knew what I was doing. I will be back and recommend the gym to all looking for a good workout.

Onyx is a boutique gym with trainers who really know their stuff. The classes are fun, inclusive and cater to all levels whether you’re a beginner or advanced. The team have created something really special with a great atmosphere that makes it a great place to train.

I've just popped into their gym in North Finchley yesterday. The first impact was a very positive one ..... cleaned and organised place....nice structure and equipment...professional staff! I've already joined and I intend to being participating in their training and nutritional programme. See you soon....

Onyx is the best gym I've been to by far. I used to always avoid classes in gyms, but Onyx classes are fun, personal and progressive. It feels like a group PT session, which is the opposite to most gym classes out there. I love going here as the coaches are all really nice people and really experienced trainers.

Great facilities with all the required equipment

This is a new, really well thought out top training zone. The classes are varied and cater for all levels . They are good times of the day too and easy to book on-line. If you want one to one sessions, these are also available from positive and competent trainers. The trainers are very knowledgable and work to your ability yet at the same time push you gently through your comfort zone. It’s a great atmosphere to train in a friendly yet focused environment. This is more than a gym. It is a place to achieve your fitness goals with like minded people in a supportive atmosphere . I have my own PT sessions here which are extremely efficient in enabling me to achieve my goals as a busy mother of three and my teenage son also attends who is training to become a pro athlete . It caters for both. You can be pushed to your max and break through barriers with focused one to one programmes and performance training or simply try new moves you thought your body could never do! The feeling is overall well being and results , with excellent nutritional advise aswell as check ins in the week between sessions. Highly recommend it here if you want a more personal and unique approach to your training. Evie Demosthenous

Hidden gem of a gym in North Finchley! Great facilities & friendly PTs.

Such an amazing gym with brilliant PTs. I have never had a bad class and even having loved make sure I travel to make as many classes as I can!!

Got recommended by a friend and she did not exaggerate how good this gym is. Solid group PT sessions, I go two times per week and getting so much stronger with good weight training programs, which help a lot with other sports I enjoy. On top of everything, I can feel that the tendon pain on my back left thigh, which bothered me for almost three years, are just getting very much in control now since the weight training started. Magic! Muay Thai sessions on Wednesday night is very stimulating! There are two experienced coaches who really demonstrate the technique, go into details with the sequences and very observant when giving corrections. There are people who are more advance but the vibe of the class is definitely supportive and beginner friendly (meʅ（◞‿◟）ʃ).

My second year with Christian and though I’ve moved out of the area, I have kept my training sessions with him. Highly professional, he’s meticulous, has great people skills (puts one at ease), and monitors the progress. Training is never boring and I’m very happy with the results,

Christian, Jack, Clark & Ellie, Ibi & Natasha & Thierry have been absolutely amazing! I was searching for gyms in the area Whetstone for 6.30 am morning classes as I have to work. There were hardly any, but I found this little gem! Ellie was so understanding about my asthma unlike another chain gym down the road! Also they show you the technique if you get it wrong (again other gyms don't focus on this) and I have burnt lots of calories during these sessions as you work hard! Love it and will continue coming. Thank you!!

I absolutely love this gym! The sessions are a perfect blend of challenge and accomplishment. The trainers are phenomenal, providing excellent guidance, and the programs are both diverse and effective. Living nearby is a huge plus, allowing me to regularly enjoy the positive atmosphere and supportive community. Every workout feels like an investment in both my physical well-being and overall happiness. Good job guys!!

Been a member for a few years now.The team are brilliant and make sessions feel very personal.Simply The Best .

super friendly, positive and knowledgeable trainers in a very modern, well kitted out and clean gym which is a joy to be taught and train in. first time today, will def be going back for more !!

I have been training at various gyms for the past 20 years. Onyx Fitness, Finchley is in my opinion one of the best. The staff are very professional and welcoming. All training sessions are totally different targeting various parts of the body and extremely testing ones fitness level. You have to try Onyx to believe how good it. Highly recommend at least a visit to see how truly good it is.

Awesome new gym in North London. All of the coaches are brilliant and really take the time to help you out and push you. Set up is great and the classes are fab - easy to dial things up or down for your ability. Totally recommend!

I have been training with Vik for over a year now and have to say he is the best trainer I have ever had. His knowledge and enthusiasm is inspiring. I have had great results so far and am still really enjoying our sessions and achieving goals that I wouldn’t be able to without his help. All of the trainers are lovely and the gym is great I would highly recommend Onyx.

My friends and I had a personal training session at 6am on the rings. Vic was brilliant, we were amazed at how much our technique and range of mobility improved in an hour. Highly recommend Onyx, a good feel and great place to work out with top personal trainers.

I've trained with Jack and has been a really good PT session both times. The way they look at exercise is so different and mindful. The space is lovely and really inviting. The staff are all really nice.

Incredible experience, hugely recommend to anyway chasing their fitness dreams. Warm, educational, enjoyable and most importantly hard work. Best fitness studio I’ve been to in London and every single coach there is an expert. Very professional yet never boring.

The movement and mobility class I attended was a thoroughly enjoyable experience - and it worked muscles I didn't know I had! Both coaches (Vik and Jack) were excellent, really patient and knowledgeable. Would highly recommend, and I will be back!

I had the pleasure of a Muay Thai PT session with Christian today, top quality training. Amazing looking gym, backed up by all of the equipment in a friendly relaxed environment. Left the building feeling better than when I entered! Thanks! :D

My training has improved significantly since onyx. Its challenging, fun, intense, and safe given Im someone who has had extensive injuries in the past. Would say Its a good place both for beginners and people who like to be challenged. Trainers are experienced, professional, and all round lovely humans.

Exercise has never been more fun or more appealing, and it’s all thanks to coaches who are at the top of their game and well-planned classes. The addition of heart rate monitors and a projector allow u to track how hard you're working and push yourself that extra mile during sessions.

As an athlete myself I only have respect for personal trainers who know their stuff. These guys are experienced and knowledgeable. They deliver structured fitness programmes which show their understand the body and its biomechanics. Keep up the good work!

By far it’s the best boxing class I’ve done. The participant to instructor ratio is amazing (especially when you compare to places like BLOK or AnotherSpace) and the focus is on actually boxing and technique comes at the same time, rather than classes that spend AGES on technique and no boxing. The coaches are really friendly too.

Amazing facilities and coaching

Great all around experience. Coaching standard is excellent, would highly recommend to anyone looking to get in shape or already in shape.

AMAZING GYM!!! Onyx has great facilities and high quality equipment. Classes are always challenging in a good way which keeps you motivated! They focus on ALL the different muscle groups, movement and mobility; always ensuring that we are all using the right technique. All the trainers are very supportive, encouraging and knowledgeable. The aftercare from all the team is amazing. Atmosphere is comfortable for people of any age, shape, and fitness level. It makes me WANT to go to the gym. The best private gym I have ever trained in. I definitely recommend this gym.

Great people! I'm was apprehensive on my first visit but super nice people, felt welcome and enjoyed myself.

Vic and the team are second to none. The A team of personal trainers in one place. Where else would you want to go?

Onyx is an absolute gem. Fantastic (and brand new!) equipment with highly professional trainers who really challenge you to push yourself physically and mentally. What I like most about is that the trainers make rigorous exercise fun, I made friends with fellow members and trainers instantly. Great community feel and fantastic range of classes. Can't recommend it enough.