Why Join US?

Gym | Muay Thai | MMA | Personal Training | Group Fitness

At AJ's Gym Peterborough we pride ourselves on being a highly professional, ego free and welcoming fitness facility which welcomes those who want to get fit, improve confidence and enjoy themselves.

We have become a highly established Muay Thai, Kickboxing & MMA gym for both Juniors and Adults.

In December 2020 we started off as a Group Training, Martial Arts and Personal Training facility but due to demand and popularity it has exploded into a full time fitness facility alongside our very successful Kingdom Fight Team. As a result we are expanding to a much bigger facility which is currently being built and should be ready from January 2023.

September 2022 we was a finalist in the Peterborough Small Business Awards for New Small Business of the Year, and also came away with the Businessman of the Year Highly Commended Award 2022.


Led by AJ, founder of Kingdom Fitness & Martial Arts Ltd.

With over 14 years experience in the fitness industry and over 25 years as a martial artist, and many various qualifications, you are in the safest of hands.


Joining AJ's Gym, you will be pushed to your maximum limits.

Life is short and the time is now to put off achieving your goals any longer. We will motivate and guide you to help you achieve your fitness &/or martial arts goals.


Whether you want to get fit, enjoy Muay Thai or MMA training as a hobby or want to join the Kingdom Fight Team to compete you are welcome.

We make sure there are no egotistical attitudes or judgemental characters.

So there's no need to worry.


All In Membership

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This is our flagship membership option which covers everything we have to offer.

For just £55 per month, you get access to ALL of our adult classes and programmes!!!

All MMA Classes

All Muay Thai Classes

All Group Fitness Classes

1 Hour Private Gym Training Slots (Around Class Timetable & Subject To Booking...*your own workout not Personal Training)

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All In Junior Membership

Junior Class iconAdults Class icon

Our Junior All In Membership Includes the following...

All Junior MMA Sessions

All Junior Muay Thai Sessions

All Junior Fitness Bootcamp Strength & Conditioning Circuits

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Group Fitness Classes

Junior Class iconAdults Class icon

Join us for our High Intensity Fat smashing circuits!!!

So much more beneficial than a normal gym membership

Great value too with classes at 6:15pm on a Monday, Wednesday, Thursday, Friday. T

We have just introduced a Women's only circuit on Saturdays at 10am.

Suitable for all levels of fitness.

You want results fast?...then this is the one!!!

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Fight Team


Welcome to the page of our prestigious and highly successful Kingdom Fight Team.

Headed by British Pro K1 Kickboxing Champion AJ Jeffrey, our Kingdom Peterborough Fight Team is growing by the week and boasts superb talent across the European MMA, Muay Thai & K1 scenes.

Our team competes on some of the biggest Amateur and Professional shows around the UK and Europe in MMA, Kickboxing and WBC Muay Thai at Junior and Adult level.

Our Junior MMA team has an excellent grading syllabus in place which offers the chance to progress to competition level on a regional and national level.

We also welcome people that want to train in MMA and Muay Thai but not necessarily want to actually compete but want to learn and be a positive addition in the training to help the fighters prepare for their fights and support them.

The Team


Self conscious? Don’t like working out around others? Hate waiting for others to finish using equipment? If so then this is perfect for you!!!

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How to find us

  • Turn off the main road onto Falcon Way (You'll see the car garage on the side)
  • Head down Falcon Way down the hill to the bottom
  • Turn right at Harrier Way
  • Keep going straight up the road.
  • Look for the Prosper Court sign then turn in.
  • 1st unit on the right you cant miss the massive Kingdom Gorilla sign.
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