D12 Fitness is West Wales's dedicated independent gym and fitness centre. Modern equipment, expert coaching, and a community that pushes you forward — whether you are stepping into a gym for the first time or chasing a personal best.
D12 Fitness was built for the people of Carmarthen and West Wales — not as a faceless chain, but as a place where coaches know your name, your goals, and your progress.
Since opening our doors, we have helped hundreds of members transform their health, build strength, lose weight, improve endurance, and feel genuinely good in their bodies. We believe fitness should be accessible, practical, and even enjoyable — and our facility and team are built around that belief.
Whether you are a complete beginner taking your first step, or a competitive athlete looking for a serious training environment, D12 Fitness has the space, the kit, and the expertise to meet you where you are.
From the gym floor to one-to-one coaching, D12 Fitness provides a complete suite of services designed to help you reach your goals efficiently and safely.
A spacious, fully-equipped training floor with the latest resistance machines, free weights, and functional fitness areas. Clean, organised, and always well-maintained.
More than twenty classes per week covering every discipline, from high-intensity interval training to yoga and spin. Our group classes are inclusive, energetic, and led by dedicated instructors.
Work one-to-one with an experienced personal trainer who will design a programme around your specific body, goals, and lifestyle — then hold you accountable every step of the way.
Training hard is only half the equation. Our qualified nutrition coaches help you build sustainable, practical eating habits that support your performance and your goals — without extreme diets.
We have invested in commercial-grade equipment across every category so you always have access to the machine or implement you need — without queuing.
Our facility is cleaned throughout the day, air-conditioned, and regularly restocked with the latest additions based on member feedback.
Our main training area gives you the room to move, train, and recover without feeling cramped — even during peak hours.
Stream workouts, track macros, or blast your playlist without interruption.
Full climate control throughout the facility year-round.
Clean, spacious changing facilities with secure lockers and showers.
Free dedicated parking available for all members and visitors.
Alternating high-intensity work periods with active recovery intervals. Designed to torch calories and improve cardiovascular capacity fast.
Barbell, dumbbell, and bodyweight progressions to build real-world strength. Coached technique throughout. Progressive overload built into every session.
High-energy spin sessions set to music, guiding you through climbs, sprints, and intervals. Low-impact on the joints, high-impact on your fitness.
Bag work, pad work, and boxing-inspired drills combined into a full-body conditioning session. No experience needed — just the willingness to work hard.
Structured flexibility and mobility sessions to improve range of motion, reduce injury risk, and support recovery. A vital complement to intense training.
Fast-paced circuits using bodyweight and light equipment. Great for burning calories, building endurance, and working up a proper sweat with others.
All classes are included in monthly memberships. Day-pass holders can attend any class for a small additional fee.
View Full TimetableGroup classes are great, but sometimes you need a plan built specifically for you. Our personal trainers work with clients of all starting points — from first-time gym-goers to experienced athletes preparing for competition.
Every programme is built from scratch following an in-depth consultation. No templates. No guesswork. Just a structured, progressive training plan that delivers measurable results.
A no-obligation initial consultation to understand your history, lifestyle, goals, and any injuries or limitations. This is where we listen — properly.
Your trainer builds a personalised training plan around your schedule, equipment access, and specific goals — then reviews it with you before you begin.
Work through your programme with your trainer guiding technique, intensity, and progression every step of the way. Push further than you thought you could.
Progress reviews at regular intervals to measure results against your goals. Your programme evolves as you do — continually challenging without ever stagnating.
Strength & Power
Weight Loss & Lifestyle
Athletic Performance
Yoga & Rehabilitation
Training accounts for roughly an hour of your day. What you eat and drink accounts for the other twenty-three. Our nutrition coaching bridges the gap between hard work in the gym and real, lasting results.
We start with a full picture of your current eating habits, body composition, activity levels, and goals before making any recommendations.
A structured, practical nutrition plan tailored to your calorie targets, macro split, food preferences, and lifestyle — no crash diets, no unsustainable restrictions.
Regular check-ins to review progress, adjust targets, and troubleshoot any challenges. Nutrition coaching is an ongoing conversation, not a one-off document.
Book a free initial nutrition consultation and start building sustainable habits that support your training and your life.
Active Members
Classes Per Week
Expert Trainers
Serving Carmarthen
No hidden fees, no lengthy contracts you cannot exit, and no joining fee for new members who sign up this month. Cancel or pause anytime with 30 days' notice.
Full access to the gym floor for a single visit. No commitment required. Great for visitors or those wanting to try before they join.
Full access to the gym and all group classes with no long-term commitment. The best value way to train consistently.
Everything in Monthly plus nutrition coaching access and a monthly PT session. For those who want the complete D12 experience.
Student, NHS, and armed forces discounts available — get in touch for details. All prices include VAT.
A snapshot of our weekly class programme. Full timetable available at reception or by request. All classes bookable online or at the front desk.
| Day | Time | Class | Instructor | Duration | Level |
|---|---|---|---|---|---|
| Monday | 06:30 | HIIT Circuit | Jake Parry | 45 min | All Levels |
| Monday | 12:00 | Yoga & Mobility | Ceri Evans | 60 min | All Levels |
| Monday | 18:30 | Strength & Conditioning | Mark Lewis | 60 min | Intermediate |
| Tuesday | 07:00 | Indoor Cycling | Sarah Rees | 45 min | All Levels |
| Tuesday | 19:00 | Boxing Fitness | Jake Parry | 50 min | Beginner to Int. |
| Wednesday | 06:30 | Cardio Bootcamp | Sarah Rees | 50 min | All Levels |
| Wednesday | 12:30 | HIIT Circuit | Jake Parry | 45 min | All Levels |
| Wednesday | 18:00 | Indoor Cycling | Mark Lewis | 45 min | All Levels |
| Thursday | 07:00 | Strength & Conditioning | Mark Lewis | 60 min | Intermediate |
| Thursday | 19:30 | Yoga & Mobility | Ceri Evans | 60 min | All Levels |
| Friday | 06:30 | HIIT Circuit | Sarah Rees | 45 min | All Levels |
| Friday | 12:00 | Boxing Fitness | Jake Parry | 50 min | Beginner to Int. |
| Friday | 18:00 | Cardio Bootcamp | Sarah Rees | 50 min | All Levels |
| Saturday | 08:00 | Strength & Conditioning | Mark Lewis | 60 min | Intermediate |
| Saturday | 09:30 | Indoor Cycling | Ceri Evans | 45 min | All Levels |
| Sunday | 09:00 | Yoga & Mobility | Ceri Evans | 60 min | All Levels |
| Sunday | 10:30 | HIIT Circuit | Jake Parry | 45 min | All Levels |
Do not take our word for it. Here is what our members say about training at D12 Fitness.
"I joined D12 after years of failed gym memberships elsewhere. The difference here is the people. The coaches actually check in with you, the members are friendly, and the whole atmosphere pushes you to keep showing up. I have lost two stone in five months and I actually enjoy it."
"The personal training at D12 is a completely different level to what I had experienced before. Mark put together a programme specifically for powerlifting and my squat has gone up by 40 kg in six months. Proper coaching, proper results. No fluff."
"The spin classes here are genuinely the best in the area. Ceri and Jake make every session feel energetic and achievable at the same time. I was completely new to the gym and never felt judged or out of place for a single moment."
"The nutrition coaching from Sarah transformed my relationship with food. I had been training consistently for two years without seeing results. Within three months of working on my diet alongside my training, the difference was dramatic. I wish I had done it sooner."
"I am 58 years old and was genuinely nervous about joining a gym. Every single member of staff at D12 made me feel welcome from day one. The equipment is excellent, the facility is spotlessly clean, and the 6:30am classes have become the highlight of my week."
"Trained at big chain gyms for years and always felt like a number. D12 is completely different. It is local, it is personal, and it is effective. The coaches actually remember what you told them last week and hold you accountable. Outstanding value for money."
D12 Fitness is not part of a national chain. We are a locally owned independent gym run by people who care deeply about fitness and even more deeply about the Carmarthen community we serve.
That independence means every decision we make is about our members — not about hitting corporate targets or rolling out standardised programmes. We adapt, we listen, and we improve based on what the people who train here actually need.
Our trainers take the time to understand your goals and your challenges — then stay invested in your progress session after session.
From day one, you will find D12 is a welcoming and encouraging environment. The only competition here is with yourself.
No fads, no snake oil, no miracle programmes. Everything we recommend is grounded in exercise science and practical experience.
Conveniently located in central Carmarthen with easy access from the surrounding areas including Llanelli, Ammanford, Haverfordwest, and the Gower. Free on-site parking available.
D12 Fitness
Unit 12, Carmarthen Business Park
Carmarthen
SA31 3TN
West Wales
Whether you want to ask about membership, book a class, enquire about personal training, or just come in for a look around — we are here to help. Get in touch using any of the methods below, or fill in the form and we will get back to you within one working day.