Our pick of the 23 best for 2026.
#1Muscleworks Gym in Bethnal Green, London is a standout for hardcore old-school bodybuilding. Founded in 1988 by champion bodybuilder Savvas Kyriacou, who has trained the likes of Ronnie Coleman. Around 20,000 sq ft over multiple rooms, open 24/7, with dumbbells running up to 180lb, a huge resistance-machine spread, cardio, bags and a functional zone. Visit muscleworksgym.co.uk.
#2UltraFlex Hull in Hull is a standout for bodybuilding, boxing and mma. One of the chain's top-rated sites, with combat-sports facilities alongside the iron. A wide muscle-group machine range and brand-new cardio kit, plus dedicated boxing and MMA facilities. Visit ultraflexgym.co.uk.
#3Temple Gym in Birmingham is a standout for hardcore bodybuilding heritage. Founded in 1987 by six-time Mr Olympia Dorian Yates, the gym that built his physique. Heavy, old-school free weights and machines in a no-frills basement built purely for serious training. Visit templegymuk.com.
#4Dedicated Fitness in Liverpool is a standout for big-floor serious bodybuilding. Sheer scale, marketed as the biggest gym in the country. One of the largest 24/7 gyms in the UK, with competition-grade platforms and a claimed world's-biggest dumbbell rack running 3kg to 150kg in 1kg jumps. Visit dedicatedfitness.co.uk.
#5UltraFlex North Leeds in Leeds is a standout for bodybuilding, big atmosphere. One of the highest-rated sites in the whole chain for atmosphere. The brand's signature body-part-zoned layout with a large spread of plate-loaded machines, free weights and cardio. Visit ultraflexgym.co.uk.
#6UltraFlex Durham in Durham is a standout for bodybuilding, strength. Among the highest-rated in the chain on a large review base. A full machine and free-weights line-up with cardio on the body-part-zoned UltraFlex floor. Visit ultraflexgym.co.uk.
#7UltraFlex Normanton in Wakefield is a standout for bodybuilding, strength. Rated among the chain's best for equipment upkeep. A complete bodybuilding machine line-up with extensive free weights and cardio, laid out by muscle group. Visit ultraflexgym.co.uk.
#8UltraFlex Derby in Derby is a standout for bodybuilding, fitness. Consistently strong member sentiment on staff and cleanliness. High-quality machines from reputable manufacturers with a full free-weights area and cardio, zoned by body part. Visit ultraflexgym.co.uk.
#9Better Bodies Gym in Northampton is a standout for champion-led bodybuilding. Owned by IFBB Pro Kamal El-Gargni, a 212 Olympia and Arnold Classic champion who trains members personally. A large selection of high-quality bodybuilding and strength equipment with a generous free-weights area. Visit betterbodiesltd.co.uk.
#10Peak Physique Gym in Cardiff is a standout for old-school bodybuilding. A cornerstone of Cardiff's scene since 1995 that has produced multiple champions. A huge free-weights selection alongside the latest Cybex and Hammer Strength plate-loaded machines and a full dumbbell and plate range. Visit peakphysiquecardiff.co.uk.
#11Muscle Fusion in Sheffield is a standout for weightlifting and strength. Sheffield's go-to dedicated strength and weightlifting gym. A dedicated weightlifting and strength gym with a strong free-weight and machine selection, rated locally as Sheffield's best for strength. Visit musclefusiongym.co.uk.
#12UltraFlex West Leeds in Leeds is a standout for premium bodybuilding, all levels. The flagship that started the chain, with physio and combat facilities under one roof. A vast, body-part-zoned machine floor backed by a full free-weights area, dedicated cardio suite, an on-site martial arts and boxing space and the Regen physio clinic. Visit ultraflexgym.co.uk.
#13UltraFlex Rotherham in Rotherham is a standout for bodybuilding, town-centre access. A large review base and a handy central location. A comprehensive machine and free-weights set-up with a dedicated cardio area on the brand's zoned floor plan. Visit ultraflexgym.co.uk.
#14UltraFlex Lincoln in Lincoln is a standout for bodybuilding, 24-hour access. 24-hour access for full members, a rarity in the chain. Top-quality kit in a spacious layout, with 24-hour access for full members (day access from 6am). Visit ultraflexgym.co.uk.
#15Ultimate Fitness Birmingham in Birmingham is a standout for strength and bodybuilding. Opened in 2013 by former British champion Simon Fan; pros from Ronnie Coleman to Phil Heath have trained here. Premium plate-loaded and selectorised kit from Hammer Strength, Atlantis, Cybex and Prime across an extensive strength and free-weights floor. Visit ultimatefitnessbirmingham.co.uk.
#16Project Flex in Brough, East Yorkshire is a standout for premium machine bodybuilding. A premium destination bodybuilding gym kitted out with top-tier machine brands. Brand-new Nautilus, Hammer Strength, Precor and Gymleco machines with a strong free-weights and cardio selection that's continually refreshed. Visit projectflexgym.co.uk.
#17BodyZone Fitness in Newcastle upon Tyne is a standout for city-centre strength training. One of Newcastle's longest-running independent strength gyms, going since 1986. A long-established, free-weight and strength-focused floor in the heart of Newcastle, well stocked for bodybuilding and conditioning. Visit bodyzonefitness.co.uk.
#18Tatham Powerhouse Gym in Nottingham is a standout for hardcore strength training. An established Powerhouse-brand strength gym in the city. A Powerhouse-branded strength gym geared to heavy free-weight and machine work, well known to the local bodybuilding community. Visit powerhousegym.co.uk.
#19UltraFlex York in York is a standout for bodybuilding, evening training. Late 11pm weekday closing for evening lifters. The brand-standard zoned machine layout with free weights and cardio, and useful late weekday opening to 11pm. Visit ultraflexgym.co.uk.
#20UltraFlex West London in Uxbridge is a standout for bodybuilding, fitness. UltraFlex's flagship London site and its southernmost UK gym. Top-quality machines, a full free-weights area and cardio, with experienced personal trainers on site. Visit ultraflexgym.co.uk.
#21Extreme Gym in Glasgow is a standout for bodybuilding, heavy free weights. Widely regarded as Glasgow's leading dedicated bodybuilding gym. Glasgow's best-stocked bodybuilding floor, with extensive free weights, heavy lifting kit and a CrossFit zone with ropes and rings, recently renovated. Visit extreme-gym.co.uk.
#22Ministry of Fitness in Bristol is a standout for bristol's biggest independent. The largest independent gym floor in Bristol. Over 11,000 sq ft split into four training areas covering free weights, machines and functional training, the city's largest independent floor. Visit mofgym.co.uk.
#23The Warehouse Gym in Leicester is a standout for biggest equipment selection. One of the largest independent gym floors in the East Midlands. A 15,000 sq ft facility with 100+ pin and plate-loaded machines from world-renowned manufacturers, the largest range in the area. Visit thewarehousegym.co.uk.
