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 with CrossFit & Hyrox classes.


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.

We are a registered CrossFit affiliate – Gymnasium CrossFit Clapham, and are a registered Hyrox affiliate.

Clapham | Gymnasium CrossFit

Memberships start at £140 a month, to find out what the best one is for your goals just get in touch!

To see the latest offers and get up to 50% off your first month get in touch!

Visiting the area, or want to jump into class with a friend who is an existing member? Have a look at the timetable below and get in touch. Drop ins cost £25.

Book a free, no obligation taster 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.

An accessible fitness program which uses natural movement to help you achieve your goals, whether that’s weight loss, strength or general fitness.

It mixes cardio, strength training & high impact exercises, adaptable to your own level, in an environment that is fun and energetic, all under the guidance of one of our experienced coaches.

A more technical fitness program that combines elements from high-intensity interval training, Olympic weightlifting, gymnastics, and more.

It’s designed to improve overall fitness and physical strength through varied & challenging workouts under the guidance of one of our experienced coaches.

Our Stronger program is designed for small groups to ensure personalized attention.

Each session is guided by an expert coach, focusing on key lifts including push, pull, squats, deadlifts, and presses.

With no cardio involved, every workout maximizes your strength gains.

Wall Walks | Gymnasium Brixton CrossFit

Our specialized Motion class is designed to enhance joint mobility, strength, & stability across your full range of motion.

This class complements our other programs & yields substantial improvements in your gymnastics, strength, & lifting abilities.


This program adapts throughout the year to the specific demands of each competition, Hyrox, ATHX & Turf.

Classes focus on the unique challenges of each events, with expert coaching & simulations to refine your strategy & skills.


Technically complex, compound exercises that produce some of the highest power outputs in all of sport.

The Olympic lifts, the snatch, clean & jerk, as well as variations such as the power snatch, power clean, power jerk, hang snatch, hang clean and more are used by athletes to develop strength & explosiveness & are transferable across all other sports.

Run Club

If you are aiming to crush a 5K, conquer a triathlon, or simply improve your running skills, join us twice a week for a dynamic mix of distance, track, hills, and drills.

Sessions cater to all levels, offering expert guidance to enhance your endurance, speed, & technique.

Open Gym

Book a studio slot to perfect a skill, catch up a missed class or do your own workout.

Timetable – PDF

Some OGs with >1000 classes 🙌🏻

We love to see members progress at Gymnasium over time 🥹
The ring muscle ups were muscling yesterday evening with the 6pm crew. Awesome to see members progressing so much and were only half way through the block 💪
#crossfit #fitness #gymlondon #londongym #fitnessmotivation #training #crossfituk #motivation #sport #fitfam #personaltrainer #wod #gymlife #ringmuscleup #gymnastics #londoncrossfit #gymmotivation #crossfitlondon #exercise #healthy #healthylifestyle
🏃‍♀️ | Gymnathlon entries are LIVE!!

🔗 | Sign up link on your Members App

📆 | 29th June 10am-5pm

🎟️ | Team Games SOLD OUT so don’t miss your chance, sign up now!

🤩 | The Gymnathlon features 8 Mini Workouts, with either Row, C2 Bike or Running between each station. The workout itself will last from anywhere between 45 Minutes to 90 Minutes. 

This event features 2 different divisions, RX and Everyday. If you train in the Crossfit Programme and are comfortable with low volume Gymnastics and Weightlifting, including Kippinng Pull Ups and Hang Power Clean 60/45 then choose RX. If you typically Scale workouts, or train in our other programmes, then choose the Everyday Division. If you are unsure, please speak to your coach.

This year we are introducing our Same Sex Pairs Division! If you wanted to compete alongside your training buddy, then this division is for you!

Both RX and Everyday, the workout remains the same, you just split the work however you please, and run together with your Team Mate!

Only 1 Athlete needs to Register for the Pairs division, all you need is your Team Mates name, DOB and email address.

Entry to all Divisions includes access to The Gymnathlon itself, a Gymnathlon Tank, and Limited Edition Merch!
Team work 🤝 dream work 

Teams of 4:

15 Minute AMRAP
5 Minutes Transition

Sub Teams of 2, YGIG Rounds:
12 Worm S2OH
12 Worm Reverse Lunges
*after every round, both Athletes complete 10 Cal Echo on 2 Bikes

Buy In
3 Rounds
15 Sync Burpee Bar Touch
20 Sync DBall Hug Squats @50/40


Sub Teams of 2, YGIG Rounds:
3/5/7 Sync BMU/ C2B/ Pull Ups
6 Sync Pistols
9 Sync SDB Thruster 22.5/15
Blood, sweat and tears but even more hugs, smiles and beers 🍻

Team Games, where it really is all about your team mates 💙
Join us on May 26th 8am or 10am for ‘Murph’ - the iconic CrossFit workout 🙌

1 mile run, 100 pull-ups, 200 push-ups, 300 squats, then another 1-mile run... Scale it, Rx it, try and beat your time from last year or complete it for the first time! After conquering Murph, we’ll continue into a motion stretch.

🍻 For those who survive, celebrate with us at Trinity Arms at 1pm for well-deserved drinks!
Thanks for everything you do @tim_dunn45 👏🏻

Team Games 2024, the best one yet 🥳
Team Games Briefing 2024
Farewell to @lucycroker & @harrisonbriggs as they make the big move to North London 😭

Thanks for bringing the good vibes from Athletica through to CrossFit, putting in a shift at Gymnasium events and giving @tim_dunn45 a bit of chat when he needs it.
🏅 The teams for the Team Games are out now!! Check your email to see who you’ve been partnered up with 👯‍♀️

Live briefing will be on the Clapham instagram at 4pm on Thursday. Don’t miss coach Tim going through the details of the workouts 🏋🏼‍♀️

👀 Keep your eyes peeled for the heatlist on the members hub!

😥 If for any reason you can no longer take part please email ASAP. If you missed entry then email Tim to be put on the waitlist 🤞🏼

📍 See you at 12pm on Saturday at Rosslyn Park Rugby Club
Tim Spires has done it all with Gymnasium…

Judged the events, got sunkissed at the outdoor workouts, competed in multiple CrossFit Opens, celebrated at the Christmas parties and now ticked off his One Thousandth Gymnasium Class 👏🏻 

We’ve loved having you become part of the Gymnasium family over the years @timmytuvandang 💙
Based on 90 reviews
I go to the Clapham gym. Great coaches, great setup, great community. Not like a typical CrossFit gym where coaches want to charge for tips/training – you can always ask if you’re trying to improve a skill.
Joining Gymnasium has been the best decision I have made since moving to Clapham! Not only can you expect cleverly planned, varied programming, you will also be joining a community of great people who want to see you succeed and improve. Every time I step into the gym I know I can expect to work hard and laugh harder! The coaches take their time to get to know you and how to push you to be your best and cultivate new skills which keeps training engaging. The gym holds various events and socials throughout the year which really makes it a close knit, social and positive community. Big fat shout out to Coaches Ant, Raffi & Sam 🫶🏻
Team Support Olympic Lifting | Clapham Gymnasium CrossFit

Clapham North Arts Centre
26-32 Voltaire Rd

gym entrance | ///mugs.exam.cherry

bike rack 1 | ///

bike rack 2 | ///entire.slate.moves

Gymnasium Clapham
Based on 90 reviews