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We started Gymnasium to change the way the world gets fit.

We believe fitness is a gift that everyone should have and that working on it should be an enjoyable, energising and rewarding part of their routine.

To build all aspects of fitness we focus on three pillars – cardio, strength & mobility – in our expertly coached, well planned classes.

We work hard to build a positive and inclusive community, as we know getting fitter is more effective and easier to stick to when done together.

We are committed to using our business as a force for good, from our impact on the environment and how we treat our staff, to how we help our broader community and so are very proud to be the only gym in the UK to be certified a B-Corp.


Gymnasium becomes the first gym in the UK to become a B Corp.

We are incredibly proud to announce that we are the first gym in the UK, and only the second CriossFit gym in the world, to become a B Corporation. We have joined a prestigious global movement of companies including Patagonia, The Body Shop, Burton, Ben & Jerry’s and Innocent as Certified B Corporations.

B Corp certification is the preeminent sustainability credential. It was created by B Lab, a global non-profit that aims to make it easier for mission-driven companies to have a more positive impact on the planet and its people. Ultimately it’s about businesses being a force for good in the world. 

B Corp certification is to business what Fair Trade certification is to coffee or what Organic certification is to food production.

Gymnasium is the first gym in the UK to achieve this certification. With two sites in South West London, Gymnasium offers expertly coached, small-group fitness classes for all abilities, from HiiT and CrossFit to Mobility and Olympic lifting.

We believe all businesses should invest in a purpose higher than just profit. People care about where they spend their money, who they work for and are increasingly choosing to do that with companies that share their own valuesBecoming a B Corporation has been a key objective to demonstrate our commitment to the community we serve, the staff members we support, and the environment we use. We started Gymnasium to change the way the world works-out and becoming a B Corp is a key step to help us achieve that.

To certify as a B Corp, Gymnasium had to meet rigorous standards in 5 key areas; governance, workers, community, environment & customers. These principles are written into its Articles of Association – placing impact on people and planet alongside profit in any decision taken by its management team.

This has been achieved through a long list of initiatives that include:

A commitment to salaried positions in an industry dominated by hourly workers, the development of an internal Coach Academy programme for staff development, pay above industry average wages and the provision of a range of other benefits.

The creation of a Spartan program for underprivileged youths in collaboration with local charities and online Legends classes for those over 60. These are both provided free of charge.

Commitment to reviewing significant suppliers, seeking local alternatives wherever possible, and selecting suppliers that meet our rigorous standards including Teemill, Eleiko & Nocco.

Our charitable giving policies – supporting local charities through generation of funds collected from no-show/late cancellation fees and events.

Since its launch in 2006, more than 100,000 businesses have signed up for the B Corp Impact Assessment, yet only 3,500 have been certified which is testament to its extremely high standards.

You can read our B Corp report here.

You can’t have amazing members without great coaches

That’s why we have highly qualified, experienced and well-educated coaches. Importantly they are full time with sick-pay, pensions & holidays. There is real career progression as Gymnasium expands. They all go on regular courses across a range of fitness & nutrition specialisms and bring their knowledge back top the wider team and members. New coaches all go through our Academy, our coach development program. We are recruiting and training coaches with a wide range of skills and backgrounds who receive a series of practical workshops, videos and our handbook to show them how we coach at Gymnasium.  They then join classes to shadow our full time Coaches before starting to lead classes themselves.



Jack oversees all the goings on in the gym and works with the programme leaders to make sure members get the best possible experience. Jack is a former national league level basketball player who opened IN2CROSSFIT Clapham in 2014 and IN2CROSSFIT Farnham in 2016. He was also the driving force behind renowned UK CrossFit competition; The Athlete Games. His passion is taking athletes who do not count themselves as remotely fit and showing them what they are really capable of.

Level 3 Personal Trainer:
  • Ushomi Fitness
  • Kettlebell Instructor
  • Bullgarian Bag Instructor
  • Olympic Lifting
BWLA Level 1: Olympic Lifting Instructor
  • CrossFit Level 1
  • CrossFit Kids
  • CrossFit Mobility
  • CrossFit Football
  • CrossFit Coaches Prep Course
  • CrossFit Westside


Pete leads our Athletica program. He was born in Cape Town, South Africa and has been coaching since 2007. He represented his Province in rowing and played high level rugby until 2011. As a coach he has worked with Hollywood actors, stunt crews, sports teams and specialises in building female specific conditioning & strength programs.

  • Crossfit Level 1
  • Gym Jones Level 1


Tim leads our Compete program. Tim has played competitive Football his whole life. He represented his NZ province at under 21, and at the Milk Cup in Northern Ireland in 2008. He captained his team to 3rd place in the NZ Premier League. He has a Graduate Diploma in Applied Science specialising in Physical Conditioning, and has worked with and alongside top conditioning coaches and National Representative Scholarship athletes.

  • Crossfit Level 2
  • Crossfit Kids
  • Graduate Diploma in Applied Science Specialising in Physical Conditioning (Level 7)
  • Diploma in Applied Sport and Exercise Leadership Specialising in Personal Training (Level 5)


Sam joined Gymnasium as a member, starting out in Athletica and then adding Compete. She fell in love with Gymnasium and wanted to make it a more permanent fixture in her life and so 18 months later joined as a full-time coach.

Sam was a former swimmer, representing her county and competing at the Nationals. Although she no longer competes, she still very much enjoys the odd splash about and even started up the Gymnasium Swim Club.

  • CrossFit Level 1
  • PT Level 3
  • Swim coach Level 1


Teddy’s passion for movement, fitness and wellbeing was realised through his footballing and rugby background. He obtained his MS Degree in ‘Applied Exercise Physiology’ from the University of Central Florida, at the same time as initially interning at a Strength & Conditioning Facility (Spectrum Sports Performance) and working as a Head S&C Coach at Trinity Prep High School for their Lacrosse, Volleyball and Swim teams. Teddy started CrossFit in 2016 and quickly fell in love with functional fitness and the community created through group training. His ultimate goal is to assist others with their fitness and wellbeing, and to always be improving as coach through further experience and education.

  • Applied Exercise Physiology MS
  • CrossFit Level 1


After working in marketing for years, Sophia trained and qualified as a fitness instructor around her 9 to 5 – running classes before and after work (sometimes taking a cheeky nap at lunchtime!). She realised that fitness was her passion, decided to peruse it full time and hasn’t looked back since.

Sophia is a qualified yoga instructor and loves helping people out with their mobility. In her spare time you can usually find her on her bike or running around SW London – so she’s super excited about Gymnasium’s Run Club and Cycle Club, and hopes to see you there too!

  • CrossFit Level 1
  • Level 3 personal trainer
  • Yoga instructor


Nic, was born in Johannesburg, South Africa. He played professional level rugby, as well as district level waterpolo and district level bouldering. Nic then moved to Cape Town where his coaching career began. In the eight + years since, he has trained private clients with individual needs, celebrity clients with specific goals for film, and most especially, group classes with mixed level participants. Nic is passionate about functional fitness and the combination of both strength and mobility. He takes pride in being a part of his clients’ personal health & fitness journeys and believes that it also plays a major roll in ones mental health.

  • CrossFit Level 1


Coach Alex first joined us as a member in 2015, after a few years learning about the Gymnasium experience as a member, Alex joined our part time coaching team.  In 2018 Alex left the corporate consulting world to join our permanent team and has vowed never to wear a suit to work again! Alex oversees everything to do with our strategy, processes and finance. He is a bit of a jack of all trades and this also translates over into this accomplishments as an athlete and coach. Alex is a CrossFit Level 2 Coach with a sports background in swimming, water polo and rugby.


After 25 years in corporate environments providing project management, administration, and business support services Karen started working with Gymnasium in 2017 and joined the team full-time in 2020.

Karen looks after all things non-coaching related including member services, business support and HR – if you have the red bar of shame, cannot book a class, want to change your membership or pass on some feedback Karen is the one to contact!

A former Nationals level competitive swimmer and Western Counties champion she now mainly swims open water and occasionally competes.  Owner of 14 year old twin girls Karen is well equipped for anything the members or the coaching team throw at her!

Coaches are the cornerstone of our community and so we want the best. The Gymnasium Coaching Academy is our in house coaches training programme. The aim is to take people who are passionate about a career in fitness and develop them to become epic Gymnasium Coaches.

Our programme lasts approximately 3 months, and during this time coaches will participate in classes as members, before shadowing classes with our full time coaching team, and eventually leading classes whilst under supervision.

Every week the academy coaches meet for their Coaching Academy Clinic session. During these sessions our experienced coaching team will work with the academy to develop key coaching skills.

Alongside weekly coaching clinics there are also Coaching Academy Camps. These are all day sessions where coaches are taken through all the key progressions, coaching cues and corrections that we use in our classes.

All academy coaches receive regular feedback as they progress through each stage and those who graduate can go on to join our part time and full time coaching team.

Understanding what it is like to be a Gymnasium member is one of the cornerstones of the programme, that is why all of the Academy coaches benefit from a free membership for the duration of the programme.

Our next intake of for our academy is summer 2022, to apply please contact jack@gymnasium.fit

What set us apart is our focus on members above everything else

Everyone is welcome and all our workouts are adjusted to match the needs and abilities of every individual. Our current mix of Athletes is diverse and includes 75 year old Peter, competitive athlete Gwendolyn (and her new baby), 36 year old teacher Rebecca and 10 year old want-to-be pro footballer, Elliot.


From beginners to advanced, Gymnasium is the best place for you. Coaches are very friendly and amazing professionals, are very well prepared and always there to help you achieve your best, it doesn’t matter if it’s your first time at the gym, they’ll make you feel at home. After years away from the fitness life, I couldn’t find a better place, the results were visible in less than a month. Wide range of lessons, and a very supportive community, felt good and welcomed from day 1.


I have been a member of Gynmasium Wandsworth since it opened in April and absolutely love it. I always walk away feeling great and with a smile on my face. The coaches are welcoming, amazing and incredibly professional whilst you are surrounded by tonnes of other friendly members, all at different fitness levels but having a fun time, enjoying getting fit and training together. The studio is also super clean and high end which makes it a really great place to train plus they have such an impressive variety of workouts and programmes which you can scale up and down. I will hugely recommend to anyone!


You get a great workout every-time you come to Gymnasium, but that's only the beginning. The programming is such that you also make incremental progress towards developing and mastering skills and movements you may never have thought were achievable.

All of this is done in a genuinely friendly and supportive community environment with expert coaching, top notch facilities and no small amount of banging tunes. I can honestly say Gymnasium has completely changed my outlook on my training and helped me vastly exceed what I thought possible from myself.

Show up, commit to the process and it can do the same for you.

We use Teemill, a pioneering sustainable business that only uses organic materials and renewable energy powered factories. Real time, individual printing and shipping worldwide, all from the Isle of Wight. Visit our Gymnasium Teemill store here.

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