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Our purpose is simple: to build the best gym in the world; a gym that improves our members’ fitness & health by combining expert coaching, intelligent programming & fun in a place where everyone feels they belong.

We are a strength, conditioning & mobility gym based around expertly coached group training. We know that getting fitter is better, easier to stick to & more effective when done together so our community is at the very heart of what we do.

We cater for all abilities; from people with limited experience but a desire to get fit, to those looking to add a technical & competitive element to their training.

Our large space, conveniently located off Clapham High Street, is stocked with top of the range equipment and great changing, showering & communal facilities with free towels & toiletries.

Gymnasium is the only certified B-Corp gym in the UK and recently appeared in Men’s Health as one of the World’s Best Gyms.

Athletica – mix of cardio, body weight and strength at high-intensity

Stronger – focusses on building fundamental strength with pushes, pulls and squats

Motion – flexibility, joint strength & stability

CrossFit – constantly varied mix of weightlifting, gymnastics & cardio at high-intensity

Olympic – technically complex, compound lifts

Open Gym – book a studio slot to perfect a skill, catch up a missed class or do your own workout

Read more about our classes

Gymnasium Clapham

We have three types of membership which give access to different classes, classes are unlimited and we have three access times options; anytime, evenings (after 3pm) & weekends or flex which adds some mornings to evenings & weekends.

Athletica – Access to Athletica classes

Anytime – £135

Gymnasium – Access to Athletica, Stronger, Motion classes

Evening & Weekends – £165

Anytime – £185

Gymnasium Plus – Access to Athletica, Stronger, Motion, CrossFit, Olympic & Open Gym classes

Evening & Weekends – £205

Flex – £215

Anytime – £225

As a new member you can also get a 25% discounted 3 month option on each of these.

Free single class trial

Book a free, no obligation trial by selecting a class and a time, filling in and submitting the form.  Athletica is our most accessible class which mix of cardio, body weight and strength at high-intensity. Stronger focusses on building fundamental strength with pushes, pulls and squats and absolutely no cardio! If you have prior CrossFit experience and would like to book a CrossFit class please email Coach and we can fix you up.

Book free class

30 day membership for £50

To really help you get a feel of what Gymnasium is all about you can get a 30 day trial membership with unlimited classes, maximum of one a day, for just £50. This includes access to all Gymnasium membership classes, though some busy times are restricted to full members only.

To see the classes available on our 30 day trial click here.

Buy 30 days for £50

25% 3 month discount

As a new member you can also get a 25% discount on a 3 month membership. Email Coach.






GYMNASIUM RIOT | Brixton vs Clapham vs Wandsworth | Sign up as a mixed pair or solo and get matched. ...

Sign ups for our nutrition course are now live!

🥗| Fuel fundamentals is a 4 week course combining presentations, 1-on-1 support, toolkits, recipes and fitness classes to help you develop a better understanding of, and attitude towards nutrition, health and fitness and how they work together.

😘 | Fuel fundamentals is not a quick shred, calorie counting, weight loss course. Through this holistic approach previous participants have seen an improvement in sleep, focus, strength and muscle and, on average, 2kg weight loss!

🎂 | We help you give up processed food, sugar and alcohol to hit the reset button on your nutrition, break the cycle of bad habits and set the foundation for long term healthy habits.

👩‍🏫 | Participants will get individual guidance on how to set and achieve personal goals, Education on nutrition and portion control, A comprehensive meal planner and recipe book, specific Fuel group workouts, support from a dedicated coach and the Fuel community, guidance post-challenge, Inspiration & insight from guest speakers.

⚖️ | This is not for the uncommitted or those looking for a quick fix, but we, and your fellow participants will be there for you throughout the process. We know that better nutrition in combination with classes based our 3 pillars of fitness deliver incredible results.

📅 | Here are some key details:
- In person kick-off Sunday 16th April at 12pm, location: Gymnasium Wandsworth with coach Ryan - Full 4 week course stats Monday 17th April

Sign up via the link in bio.

🧢 | Gymnasium Caps

Get yourself a Gymnasium Cap before the snapbacks are all snapped up 👀

Link in Bio 🔗

➕➕| Two new GYMNASIUM PLUS memberships available with access to CrossFit.

Our all-access, any-time Gymnasium Plus membership is currently full but we do have class capacity in evenings, at weekends and certain times in the morning.

We have now added 2 memberships for members who want to add CrossFit in their training to allow access at these specific times.

We can upgrade people to full Gymnasium Plus when a slot becomes available.

🤩 | Gymnasium Plus Evening & Weekend

Includes all weekday classes from 3pm onwards, and all weekend classes. Includes Athletica, Stronger, Motion, CrossFit, Run & Open Gym.

💥 | Gymnasium Plus Flex

Gives you the option to train in some morning classes (for example 5:30am or 8am classes), as well as all weekday classes from 3pm onwards, and all weekend classes. Includes Athletica, Stronger, Motion, CrossFit, Run & Open Gym.

📧 | Email karen@gymnasium.fit to switch to one of our new Gymnasium Plus memberships.

But wait there is more…

😮 | Gymnasium Plus Flex is also available as part of our 30 days for £50 intro offer.

If you have previous CrossFit experience and you want to try our Flex intro, email jack@gymnasium.fit

Partner workout, Increasing ladder of Hero Makers and Calories 🔥
Was this the hardest TFIF?

Are you ready for our first event of 2023? Drumroll, please...it's THE RIOT! This mixed pairs event is happening at all 3 of our gyms and we couldn't be more stoked about it.

Here's the deal: there's only one division, so no matter your level, you can get in on the action. Find a partner from your gym and sign up, or let us play matchmaker and pair you up with a like-minded athlete.

Mark your calendars for April 15th - that's when we'll be throwing down from 9am to 3pm. But wait, there's more! After the event, we're heading to The Upstairs in Brixton to party the night away.

Sign ups go live on Wodboard TODAY, so don't miss out on the chance to compete and celebrate with your fellow Gymnasium members.

Let's do this! 🙌🏻

Ladies Who Wall Ball 💅🏼

Todays CrossFit session is a classic CF workout… Karen… but with a spicy twist 🔥🔥🔥

150 wall balls BUT every time you break on the wbs you must complete 20 American kettlebell swings 😅

Who’s booked in?

From loo rolls & energy suppliers to our Legends program & the red bar of shame we are committed to using our business as a force for good. We are proud to be the only B Corp gym in the UK.

Becoming a B Corp was a key objective for us to demonstrate our commitment to the community we serve, the staff members we support, and the environment we use.

To become a B Corp, we had to meet rigorous standards in five key areas: governance, workers, community, environment, and customers. We achieved this through a range of initiatives that we’re proud of, such as providing salaried positions in an industry dominated by hourly workers, creating an internal Coach Academy program for staff development, offering pay above industry average wages, and providing a range of other benefits.

We’ve also created programs to give back to the community, such as our Spartan program for underprivileged youth in collaboration with local charities and our free Legends classes for those over 60. We’re committed to reviewing significant suppliers and selecting those that meet our high standards, including Teemill, Eleiko, and Nocco. We also prioritize local alternatives whenever possible.

Finally, we’ve implemented charitable giving policies to support local charities through the generation of funds collected from no-show/late cancellation fees and our events.

Being a B corp puts us in the company of other well-known brands such as Patagonia, The Body Shop, Burton, Ben & Jerry’s, and Innocent, who prioritize sustainability and being a force for good in the world.

Thanks for being part of the journey.

@bcorpuk @bcorporation #bcorp #crossfit

Happy Sunday, fam! 😁 ...

Rare footage of someone smiling on an echo bike… 😅 ...

And that’s a wrap !! Another epic open at Gymnasium. Congrats to everyone who participated and thank you to everyone who helped out 🙏❤️🫶 ...

Well done to everyone who smashed 23.2 at the weekend!

Don't forget about our Gymnasium Crossfit Open social competition going into the last week!

Upload a photo or video of yourself or your friends competing in the The Open workouts onto your Instagram, tag your respective Gymnasium and add the hashtag #gymnasiumopen23 to go into the draw to win a £100 Lululemon voucher!

Also don't forget about The Open After Party held on Saturday evening from 6pm at the Stonhouse Pub in Clapham! Come grab a beer, share Open stories and celebrate the victories over the last 3 weeks!

We love to see your Gymnasium Crossfit Open successes! There were some amazing achievements last week and we want you to share them with us!

Upload a photo or video of yourself or your friends competing in the upcoming workouts, 23.2 and 23.3 onto your Instagram, tag your respective Gymnasium and add the hashtag #gymnasiumopen23, and go in the draw to win a £100 Lululemon voucher!

If you post and tag for the next 2 weeks, you will have 2 chances to win.

Tasty, tasty #TeamHunt Thursday!
Well done, team! 💪💪💪

Wanting to give one of the best gyms in the world a try? 👀

Sign up to our £50 offer for your first 30 days! Link in Bio 🔗

A massive well done to everyone who smashed Open 23.1 at the weekend! Amazing effort from everyone, we saw first Toes to Bar and first Ring Muscle Ups! Look forward to seeing what this week brings 👀 ...


A1 Sumo Deadlift 5 x 6
A2 Ring Push-up 5 x 6
5 reps on each arm, use a push jerk not split jerk. Go heavy!

Superset with plank band reach x 10 each arm
C1 Jumping Lunge 4 x 6
Light dumbell in each hand
C2 Single DB Clean 4 x 8

Last chance to sign up!!

The CrossFit Open will take place on

Saturday 18th - Workout 1
Saturday 25th - Workout 2
Saturday 4th - Workout 3

Anyone can enter no matter your ability and take part in the worldwide event. Log your scores on the leaderboard to see how you rank in your gym, against your friends and everyone else in the world!

Register at www.crossfit.com

We do love Sundays 🧘🧘‍♀️


This month’s MOTM goes out to unsung hero, Andrew Trotter. Between juggling his work schedule and being a father, Andrew still finds time to train regularly by grinding it out in 5:30am classes. More so, Andrew is now up-skilling in our evening Intro to Crossfit classes too! 💥

We see you Andrew - and commend your hard work!! Keep hustling 👊

The Crossfit Open is almost here!

Coach Tim explains how Saturdays are going to work and everything you need to know from how to book in, when the workout will be explained, how the heats are drafted and where to find your heat times.

If you have any questions, please email tim@gymnasium.fit

🐒| Grinding it out on the bar - building and strengthening that core and upper body 💪 ...

Scenes from the Vault this week… 👌💪 ...

🏃‍♀️| First week of Run Club in the bag!

Mondays & Wednesdays, information and booking on WOD

🪄| Winding down for the week - restoring all the muscles, joints and tendons…


✌️Snippets from this week’s IWT program ...


Clapham North Arts Centre
26-32 Voltaire Rd

Gym entrance | what3words | w3w.co/mugs.exam.cherry
Bike rack 1 | what3words | w3w.co/cloud.link.danger
Bike rack 2 | what3words | w3w.co/entire.slate.moves
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Free trial | 1 month for £50 | 25% off 3 months