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

  • Suzanne Robinson

    Suzanne Robinson

    5 days ago

    Great gym, lots of equipment and really knowledgeable friendly staff
  • Ehsan AFG

    Ehsan AFG

    4 months ago

    hi i am interested to join underground can u suggest me how much i will pay monthly fee?
  • JoBo Curl

    JoBo Curl

    3 years ago

    New equipment, spacious and light, friendly helpful staff plus got sauna compared to its sister gym in brighton
  • Michael Hodges

    Michael Hodges

    9 months ago

    Awesome gym. Started going here a year ago now and will never look elsewhere. Huge gym, great range of quality equipment, loads of space - it doesn't matter what time of day you go or how busy it is, you can always do the workout and exercises you want. Great staff and lots of classes available too.
  • Stephen Cheeseman

    Stephen Cheeseman

    a year ago

    I've been a member at this gym for 10 months now and I can sincerely say it is the best gym I've ever been to. The variety of classes is seriously good with options such as calisthenics, strong man, olympic lifting and more which I have never seen in another gym. There is a huge range of great equipment with options for any type of gym-goer or fitness goal. The staff are also really friendly and genuinely care about how you are doing, which makes it a really friendly atmosphere. If you're looking for a gym in the new year in the Tunbridge Wells area, look no further!
  • Helen Dear

    Helen Dear

    2 months ago

    This is my 6th week at Underground Gym and already i have seen the benefits. My muscle tone has improved, fat ratio is down, and endurance up, etc. If you are new to the gym scene don't let the huge array of machines and equipment put you off. Equally, don't be scared off by the muscle bound bodies of the customers and staff. Everyone i have spoken to has been lovely, the clients are friendly and happy to help, and the staff are amazing. I have never known a gym with so many super proffessional and qualified staff ranging from ex pro boxers, high jumpers, weight lifting champs and bikini models. Joining underground gym will be the best decision you make today.
  • Jamie Brown

    Jamie Brown

    a year ago

    Joined back in April, have really enjoyed my first 6 months at this gym. It has loads of equipment so you don't spend time hanging about waiting for others to finish. The staff are excellent and are all very welcoming. Early morning classes are a huge plus for me too. Easily the best gym I have been too and good value for money too. Only gripe is that the showers could be upgraded a bit but other than that no complaints.