CrossFit has become popular in the UK over the last 10 years for good reason... It works!

"CrossFit is a lifestyle characterized by safe, effective exercise and sound nutrition. CrossFit can be used to accomplish any goal, from improved health to weight loss to better performance. The program works for everyone—people who are just starting out and people who have trained for years"





We use a combination of weightlifting, gymnastic movements and cardiovascular exercises. You will see all areas of your strength and fitness improve as you train with us. We combine these disciplines into one CrossFit class lead by expert coaches.​


Our coaches provide expert guidance on how to scale each workout for your needs. Because we limit our class size we are able to offer you a tailored service every time you are with us.

And lets not forget the community of people that are here to sweat with you, encourage you and motivate you. A CrossFit box is like a second home. You will soon enjoy every visit you make to the gym.



Decennia was originally set up as a weightlifting club and has seen lifters reach success on a national level.

Weightlifting consists of two lifts, the Snatch and Clean & Jerk and aside from the growing public participation in the sport these two movements will also improve your strength, power, speed and agility for most other sports as well. Whether you just want to learn and perfect your technique or you are a seasoned weightlifter, come and join the team! 

All of our sessions are coached by  British Weightlifting (BWL) licenced coaches and we have the only Level 2 BWL coach in the area.


Gymnastic Strength

Gymnastic skills should be an important part of your fitness plan and we believe essential if you want to build a solid and injury free foundation on which to progress. Our gymnastic strength classes work on pulling, pushing and mid-line strength, both straight arm and bent arm work and delve into more complicated movements such as muscle ups, handstands and levers when you are ready. Our classes are suitable for any level, so if you are a proficient CrossFitter wanting to dial in those harder skills to shorten your workout times or if you are looking to achieve your first ever push up or pull up then we have you covered with our structured and progressive programming cycles.

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© 2019 Decennia Ltd

Unit 3, Carlton Terrace, Boundary Road, Portslade, BN41-1XF


Class Times

Mon/Wed/Fri: 6am, 8am, 9.30am, 4.30pm (not Fri), 5.30pm, 6.30pm

Tue: 6am, 9.30am, 5.30pm, 6.30pm, 7.30pm

Thur: 6am, 9.30am, 5.30pm, 6.15pm, 7pm

Sat: 8am, 9am, 10am