A new level of fitness

The Gym That Gives You Real Results

Join our friendly fitness community with gyms in Brighton, Newhaven and Tunbridge Wells. You bring your goals, we bring passion and determination. You'll find a wide range of equipment and classes to get stronger, fitter and more confident. We've created the ultimate fitness playground so you can learn about strength, fitness and combat at your own pace. Find out why we won "Best Independent Gym on the South Coast" by having a live chat, booking a tour or signing up today…


It's more fun together, so sign up for our wide range of classes. Focus on your own goals whilst making friends or trying a new sport... whatever you choose, you'll find great instruction and a friendly community ...

See our timetable to get inspired.

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Two people - a Black man in late 20s early 30s and an East Asian woman of a similar age - standing. The man is wearing a dark blue t-shirt with a yellow 'Underground Gym' logo and the woman is wearing a pale pink hoodie with a yellow 'Underground Gym' logo on

Underground Gym Shop

Buy the latest Underground Gym apparel and get it delivered to your door.

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Underground Online - Online Fitness Classes

Whatever your goal, you can train smarter with our top Personal Trainers and Coaches – all from your living room. With Underground Online you will never be without a workout again.

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1 Free Personal Training session When You Join

Take your first step on the road to fitness and be part of the family with a FREE personal training session. This session is 100% about you, so get ready to find your strengths and stretch your goals.

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What our customers have to say

  • Joan Quigley

    Joan Quigley

    4 months ago

    Great variety of gym equipment and good value for money. Staff friendly and helpful particularly Josh the Sales Manager.
  • Matthew Bagley

    Matthew Bagley

    2 months ago

    Personal trainers (very knowledgeable), classes are incredible. Wide variety of gymn equipment more than I've seen in other gymns I've been too in Brighton. Top notch 👌🏼
  • Francine DOICK

    Francine DOICK

    3 months ago

    Great gym really friendly staff an customers who if u needed to will help u use equipment if u ask great experience
  • Bill Wright

    Bill Wright

    11 months ago

    Great gym great staff love this gym
  • Emma Payne

    Emma Payne

    2 months ago

    ❤❤❤❤ excellent gym, great staff. Can't wait to get back there soon
  • Alice Coates

    Alice Coates

    2 years ago

    Excellent gym. Great range of quality equipment. Helpful staff.
  • Lina Duseviciene

    Lina Duseviciene

    5 months ago

    This place has everything you will ever need to keep fit and strong.