The center is an official CrossFit® affiliate. Last checked: 17/10/2025

CrossFit is a registered trademark owned by CrossFit, LLC, which is not affiliated with FitFit UK.

Information about 3 Bros CrossFit®

1 Brunel Business Court
IP24 1HP, Thetford
+447584414181

Opening hours

  • sunday: (closed)
  • monday: 6h-20:30
  • tuesday: 6h-20:30
  • wednesday: 6h-20:30
  • thursday: 6h-20:30
  • friday: 6h-20:30
  • saturday: 8h-10h
3 Bros CrossFit. Thetford's First (and only) CrossFit Affiliated Facility. Fitness classes for all abilities.

Services, Machines and Guided Classes

CrossFit®
Fit

3 Bros CrossFit®: Opinions

5/5 (20 Opinions)
Tracey Clay 1 month ago

Fantastic experience: 3Bros is such a lovely community to be part of. Everyone is so welcoming and supportive and the team of coaches are professional, knowledgeable and offer guidance and encouragement to reach your goals. I have gained in strength and confidence since joining and my fitness levels have improved greatly. Highly recommend.

Abbie Westad 6 months ago

Fantastic experience: It's small and great family experience.

Alex Snodgrass 10 months ago

Fantastic experience: I joined 3 Bros CrossFit in mid-2023, and it has been one of the best decisions I’ve ever made for my fitness and overall well-being. From day one, the atmosphere has been welcoming, supportive, and genuinely motivating. The coaches – Jack, Chaz, and Dave – are nothing short of brilliant. Each of them brings their own unique energy and expertise to every session. Whether it’s Jack’s focus on technique, Chaz’s infectious enthusiasm, or Dave’s ability to push you just the right amount, they ensure that every class is engaging, challenging, and tailored to help you thrive. They’re not just coaches – they’re mentors who truly care about your progress and make you feel part of a community. I’ve seen incredible progress since joining, both in my strength and confidence. The programming is varied, thoughtful, and accessible for all levels, but still manages to challenge you to push past your limits. The gym itself is well-equipped, and the camaraderie among members is unmatched. If you’re looking for a place to improve your fitness while being surrounded by passionate coaches and an amazing community, I can’t recommend 3 Bros CrossFit enough. It’s not just a gym – it’s a family.

Addison Moreno 1 year ago

Fantastic experience: Honestly couldn't have asked for a better team, Jack is a great coach and deserves all the success in the world, he really cares to see you succeed. If you're really interested in getting back in the gym, picking up a new hobby, and/or meeting great people, this is it!

Phil Poole 1 year ago

Fantastic experience: Dropped in to try the gym, the head coach wasn’t working but Charlie immediately welcomed me when I walked in and made me feel comfortable. I’ve been doing CF for 10 years and hold a L1 qualification so feel justified in saying the coaching was relaxed, informative and knowledgeable. The gym itself is small but well organised, equipped, clean and with a welcoming and friendly atmosphere. Highly recommend whatever your level of experience. Had a good time and will go again.

3 Bros CrossFit

Hi Phil,
Thank you so much. We are glad you had a great time. Hope to see you again soon.

Bradley Bull 1 year ago

Fantastic experience: Stopped by for a couple of drop-ins whilst away on work. The box is well equipped and clean, and the coaches were very welcoming. Will definitely come back if I'm in town

3 Bros CrossFit

Hi Bradley,

Thank you for your kind words! We hope to see you again soon.

All the best

Jamie 2 years ago

Fantastic experience: First taster session completed, very attentive staff as I had no idea what I was doing, friendly crowd too. Looking forward to the next one next week.

3 Bros CrossFit

Glar you Enjoyed yourself, Jamie! See you soon

Sharon Heneghan 2 years ago

Fantastic experience: I was in a slump of no get up and go! I googled cross fit and didn't really know what to expect. It definitely wasn't this..... I have tried everything and this is the only training I have stuck to for years. The community are lovely, the environment is very friendly and it actually makes me want to train! I look forward to going and seeing the crew and feel amazing when I leave. The coach/owner Jack is so down to earth and encouraging, making adjustments during the workouts which was key for me when my fitness was at an all time low. My only regret is not joining sooner. Get involved you will not look back!

Michael 2 years ago

Fantastic experience: You rarely find a gym that’s ego free but this place ticks that box, such a welcoming environment and Jack has been an excellent and patient coach with me

Antonio Jesus Molina Higueras 2 years ago

Fantastic experience: Excellent coaches and environment!

Alan Wells 2 years ago

Fantastic experience: What a fantastic box this place is. Jack is a phenomenal coach and the members are more like family than fellow gym mates. 10/10 in every, single way possible. Well done Jack.

harriet waters 2 years ago

Fantastic experience: After having my children, my fitness hasn’t been a priority for a few years. Joining 3bros was the best thing iv done for myself for a long time. I try to go twice a week and have already seen great progress with my strength and fitness. Jack and the other coaches are fantastic, really welcoming, patient and knowledgeable. Book for a trial, you won’t regret it!

Christopher Craig 2 years ago

Fantastic experience: Has the members best interests at heart. Be that wanting to compete or just move. Dropping in or becoming a member. Always welcomed! You'll learn a lot if your willing to get involved and listen. Great coaching. Supports the military community also.

Michael Scullion 2 years ago

Fantastic experience: Best CrossFit gym I’ve ever been too. Equipment is clean and serviceable, coaches are great. Helped my technique out a lot and got several PB’s. The community is amazing; supportive, encouraging and helpful. There’s a big ginger fella there too that looks like Jeffrey Dahmer. Jack Bloss and his wife run an amazing gym at the most reasonable CrossFit prices i have ever seen. Highly recommend. Mention scully and your get 0% off your monthly dues!

Sara Fisher 2 years ago

Fantastic experience: Can’t say enough nice things about the owner, Jack. He is always professional and kind to his members. He takes the time to give understandable instruction and goes out of his way to make anyone new to CrossFit feel comfortable. Not only is he an awesome coach, but he trains alongside his members and practices what he preaches. He celebrates your wins and progress with you. CrossFit is truly for everyone, and if you want a nonjudgmental, fun way to get a good sweat in and better your mental and physical health, then you need to join this gym!

Bethany Cornett 2 years ago

Fantastic experience: The trainer/owner is awesome. I had no CrossFit experience but I never felt out of place and everyone was welcoming. I was taught all the basics and they offer class times for any schedule. They have early morning and late evening to accommodate almost anyone. The classes are challenging but their is always adjustments for all fitness levels. I highly recommend!

frankie lake 2 years ago

Fantastic experience: I couldn’t recommend it enough! In the short time I’ve attended this CrossFit gym I’ve made more progress and learnt more from the coaches than I have in the last 10 years attending standard gyms. Jump on the free taster session you won’t be disappointed!

Bethany Jemison 2 years ago

Fantastic experience: Jack is an awesome coach, great energy, and has already made a loveable community in a very short amount of time! It's a great space to just come away from life for a little bit and have a laugh. There is no competition and anyone can do this. The coaches are always available, ready to chat and listen. You'll receive a very warm welcome here :)

3 Bros CrossFit

Thanks Beth. Love this.

Jake Austin 3 years ago

Fantastic experience: I was anxious before going to my first class as my fitness levels aren’t great but it was a really positive, welcoming atmosphere. Friendly & knowledgeable trainer, great quality equipment and the members made me feel very welcome. If you are considering giving this place a try then do it! I’m glad I did.

Partycja Piątek 3 years ago

Fantastic experience: I love this place! It's second home and second family ❤ I highly recommend 3Bros CrossFit to anyone who wants to get in shape, get strong, get fit and be around people who inspire you to be better than you were yesterday. The coaches are really awesome and helpful, they make you feel really comfortable- JB, Jack M, Ash. The classes goes super fast and you really enjoy doing it (well... depends on workout of the day) Everyday is a new training, new weakness to discover and work on.., so it is never boring.

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