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Building the best gyms in the world!

Our mission is simple; to build gyms that improve our members’ fitness & health by combining expert coaching, intelligent programming & fun in a place where everyone feels they belong.

We offer strength, conditioning & mobility classes in 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.

Our 3rd gymnasium is a large, two-studio, architect-designed space, located on Stockwell Road, next to the Skate Park, a 7 minute walk from Brixton Station. It is stocked with top of the range equipment and changing, showering and 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 Brixton.



Mix & match to ensure well rounded fitness

DELTΔ – our all round class that hits every pillar of fitness, rotating through a focus on cardio, bodyweight and strength depending on the day.

CrossFit – constantly varied mix of weightlifting, gymnastics & cardio at high-intensity depending on the day.

Motion – flexibility, joint strength & stability.

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

We have two types of membership which give access to different classes types. You can attend unlimited classes over the month, one class a day. There is no contract lock-in and only one months notice is required to cancel membership.

Gymnasium £185/month
Access to unlimited Delta classes

Gymnasium Plus Unlimited £225/month
Access to unlimited Delta, CrossFit & Open Gym classes a month.

Free single class trial

Book a free, no obligation trial by selecting a class and a time, filling in and submitting the form. Delta is our most accessible class which mix of cardio, body weight and strength at high-intensity. If you have previous CrossFit access and would like a trial a crossFit intro please email 

Select free trial here

30 days 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. If you have previous CrossFit access and would like a Gymnasium Plus 30 day intro please email 

Buy for £50 here





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


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


Whilst studying at Loughborough University Sósie was a keen hockey player and represented the University. After graduating with a BSc in Sport, Exercise and Health Sciences, she left her home in the Isle of Man for a career in sports events. During the CV19 pandemic she qualified as a Level 3 personal trainer and embarked on a new adventure as a PT. Sósie has been with Gymnasium as a part time coach since our Wandsworth gym opened it’s doors in April 2021. If you haven’t come across Sós as a coach yet you’ll certainly have seen her sweating away in a class!

  • BSc Sport, Exercise and Health Sciences


147 Stockwell Road
Brixton, London

Gym entrance | what3words | w3w.co/yoga.chef.fully
Bike rack 1 | what3words | w3w.co/shock.crowned.desire
Bike rack 2 | what3words | w3w.co/onion.shark.strike
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Free trial | 1 month for £50 | 25% off 3 months