Behind Bars

Calisthenics Academy CIC

We provide local children with access to our unique Ninja Warrior style facility to learn and experience the benefits of bodyweight exercise in a safe and engaging environment.

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Little Ninjas

Little Ninjas empowers children aged 5-12 to build fitness, confidence, and resilience through fun Ninja Warrior-style challenges. Join us for just Β£5 per session and watch your child thrive!

Personal Training

Train with our expert head coach, specialising in calisthenics, weight loss, strength, and fitness. Personalised sessions at our state-of-the-art facility help you achieve your goals while mastering bodyweight skills and strength

Social Projects

Our Academy transforms lives through social projects, offering affordable or free and subsidised programmes for underprivileged children, at-risk youth, and families, fostering fitness, resilience, and community connections in a supportive environment

Schools and Groups

Bring your school or group to our unique facility! Hire our Ninja Warrior-style space with experienced coaches for engaging sessions that build teamwork, fitness, and confidence in a fun, supportive environment.

Mission

Our mission is to empower individuals of all backgrounds through fitness, fostering physical health, confidence, and resilience while building strong community connections and breaking barriers to opportunity and well-being.

Reviews

We value the experiences of our community and strive to make fitness accessible, empowering, and transformative for everyone. Your feedback helps us continue to grow and improveβ€”leave a review and share your journey with us!

Featured Classes

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Little Ninjas

Youth Project (12+)

Stats

We Smashed it!

This month our members achieved these amazing stats for their goals.

85

CHILDREN & YOUNG ADULTS ATTENDED

CLASSES THIS MONTH

16,711

TOTAL EXERCISE EXPERIENCES

DELIVERED SINCE 2020

Customer reviews

These people think we’re awesome. The feeling is mutual!

My son loves it!

19 January 2026

My son loves coming to ninjas, this is a great way to help with his strength and fitness, which really helps him playing football too! Would highly recommend

Natasha

I highly recommend!

19 January 2026

Little Ninjas is a fantastic gym for young children. Liam always keeps the sessions fresh by mixing things up each week, which really holds the kids attention. The activities are fun, engaging, and well structured, helping the children build their fitness while also developing social skills and confidence. You can really see how much thought and energy goes into every session. I highly recommended!

Brogan

Amazing πŸ‘ŒπŸ»

26 September 2025

Behind Bars is great! My son, who is autistic and non-verbal, has been attending for around 3 months. We’ve tried many groups that weren’t SEND-specific and often struggled, but the coach here is patient, kind, and genuinely inclusive. His supportive and understanding approach creates a safe, non-judgmental space where children with SEND can feel comfortable, regulate, and grow in confidence. Watching my son so happy and content doing what he loves has been amazing, and we are so thankful for what he does and what the gym offers . Couldn’t recommend it more!

Jenny