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Gymnasium is a strength, conditioning & mobility gym based around expertly coached group training. We believe a gym should be a communal experience and know that getting fitter is better, easier to stick to and more effective when done together.

Our Athletica program caters for all ages and abilities and we offer women only, competitive, new parent and children specific classes. We also offer CrossFit for those looking to add a technical & competitive element to their training.

Our large, architect-designed space, conveniently located just off Clapham High Street, is stocked with top of the range equipment and newly renovated changing, showering and communal facilities. 

Meet our coaches, some of our members or check out our gallery for a snapshot of what it is like to be part of the community.

Our programming is based around what we believe are the 3 key pillars of fitness; Strength, conditioning & mobility, with community at the heart.

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 built in. 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. The most important part of Gymnasium is our community.

JACK HENEGHAN - GYM LEADER

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 'BIG RED' OLIVIER - ATHLETICA PROGRAMME MASTER

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 DUNN - CROSSFIT PROGRAMME MASTER

Tim leads our CrossFit 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 1
  • 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)

TYLA SULLIVAN - COACH

Tyla is a Cape Town SA native who has competed internationally for SA Olympic Weightlifting. She is an experienced Crossfit L2 coach and specialises in Olympic lifting.

Her goal fits perfectly with ours; to help any person who walks through the door lift weights, get fitter and have a fun time doing it!

  • Crossfit Level 2

WES HAMILTON - COACH

Born and raised in Cape Town, South Africa, Wesley is a former professional rugby player. Wesley moved to London after hanging up his boots in 2018. He has been personal training since 2012 with a primary focus in strength and conditioning. He has trained many professional athletes and takes pride in watching members develop and becoming the best version of themselves.

  • Crossfit Level 1
  • Dip: Coaching Science (Level 3)

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.

James Clarke

I popped two disks in my back snowboarding in 2012 and spent 2 years rehabilitating my back and core. The PT I worked with through this period suggested that after my rehab I should think about how I could build on my baseline fitness and strength. I was pretty motivated to never be in that sort of pain again. I joined Gymnasium in 2014 and CrossFit gave me a constantly changing workout program in a high energy positive environment with professional coaches looking out for my safety with good form and teaching me how to move better. Combine that with the culture and community that drive and challenge you to do better, make loads of new friends and then compete with them before heading to brunch for a debrief! I challenge anyone that tries it not to love it as much as I do. I can’t imagine what else I would do at 6AM everyday!!

Kate Pollock

Joining Gymnasium is one of the better decisions I’ve made since moving to London.

The coaches are great - they are welcoming, talented and have an amazing way of getting you to do something you never thought possible.

At 6am on a snowy morning being greeted with a huge smile and enthusiasm for the class makes it just about bearable.

I’d never lifted weights, as a woman it was never encouraged at previous gyms, but now I’m stronger than I’ve ever been and still surprised at what I can do.

The workouts are constantly varied but always challenging and, somehow, fun. I’ve also made great friends through Gymnasium.

All in all it is much more than just a place to workout.

Paul Salter

Just do it! Just sign up and get down to Gymnasium, I personally haven’t looked back since. It’s been just over a year now and I’m thoroughly addicted, both to the Crossfit process and all things community that surround Gymnasium. I’m struggling to understand how I ever managed to go to main stream gyms on my own all these years.

Gymnasium is a super open and friendly place to get a serious workout in, whatever your goals. With its brand new refit, you have access to top of the line programmes, coaches, equipment and support.

To sum it up, if I’ve had a shit day, I’ll get booked in, get a serious workout in with friends, have a few laughs, get competitive and come away feeling energised and focused (except if assault bikes are involved). The tunes are OK as well ?.

Bill O'Meara

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.

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