FOR THE| Relentless

FOR THE | RElentless

NOT YOUR TYPICAL GYM

At D-12 Fitness, we don't do 'basic'! We don't compromise on quality or your experience, it's just NOT our thing.

Rated Carmarthen's No. 1 Fitness and leisure complex, D12 boasts an 'all in one' approach to fitness & leisure. Choose to get fit in our extensive and state-of-the-art training playground, or join one of our diverse group classes. However you like to train, we've got what you need. Our facilities are perfect for every gym goer; from newbies to bodybuilders, powerlifters, runners, functional enthusiasts & many more!

FACILITIES

Choose from 100+ resistance machines, free weights functional area and studio.

PERSONAL TRAINING

Stay motivated. Our personal trainers will help you find a perfect workout.

CLASSES

Improve your body strength. Join our group trainings and get in shape fast.

MEMBERSHIPS

With plans ranging from 1, 6 and 12 months, choose the right membership for your needs. 

TRENDING OFFERS

SIGN UP NOW - GET JANUARY FREE

Use code JAN2026 while purchasing any 12-month membership through our website or app to get your first month completely free. Offer available until 31st Jan 2026

*subject to monthly membership agreement 

WHATS NEW

now open - the bocs

we've added a 3000sq ft extension to house all of our functional training and classes - here you'll find everything you need for Hyrox, CrossFit, Boxing and all other forms of functional movement.

GYM TOUR

DOWNLOAD the d12 APp today!

Our app is the best way to manage your memberships, your class credits, view real-time class info and to book your place; you can even book in a friend! Download now from the Apple App Store or Google Play App Store with the buttons below! 

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