A New Level of Fitness

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Join now and get 50% off your first month's fee as a member

WHERE RESULTS
MEET REVOLUTION

Dive into the heart of fitness with Underground Gym, thriving in Brighton, Newhaven, and Tunbridge Wells. From state-of-the-art equipment to adrenaline-pumping classes, we've crafted the ultimate fitness arena.
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Ready to shake things up?

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Stronger Together

Our classes are about more than just breaking a sweat—they’re about building a community. Whether you're pushing your limits in HYROX or having fun in Spin, you’ll find support, laughter, and maybe a little friendly competition.

With flexible class times that fit your schedule, it’s easy to stay motivated and inspired.

View Underground Gym classes

"Being a part of the fitness center has truly transformed my life. I can't emphasize enough how much of a game-changer it has been for me."

Connor macmohan

CEO

"I'm thrilled to be a member of Gymaxion Fitness! The personalized attention from the trainers has made all the difference in my progress."

Willshare ahmad

Marketing Officer

"I couldn't be happier with my decision to become a Gymaxion Fitness member. The positive and welcoming atmosphere made me feel comfortable right from the start."

john cenna

Head of Design

"Joining Gymaxion Fitness has been a game-changer for my health and well-being. The facility is clean, well-maintained, and equipped with the latest technology."

deron william

Head Marketing

JOIN THE UNDERGROUND

WHERE RESULTS AREN’T JUST PROMISED—THEY’RE INEVITABLE

Step into the top-rated realm of Underground Gym, where we’re all about real gains, real guidance, and real grit. Our lineup spans from strength building to a vibrant fitness community. Become a member and start seeing the results that only the Underground can deliver.

Ready to transform?

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Flexible Membership

No Hidden Fees

A New Level of Fitness

WHERE RESULTS MEET REVOLUTION

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Stronger Together

JOIN THE UNDERGROUND WHERE RESULTS AREN’T JUST PROMISED—THEY’RE INEVITABLE

WHERE RESULTS
MEET REVOLUTION

JOIN THE UNDERGROUND

WHERE RESULTS AREN’T JUST PROMISED—THEY’RE INEVITABLE