The CDA downstairs martial arts training area
The CDA staff larking about


All Families Fight, We Just Wear Boxing Gloves!

CDA is a friendly and welcoming martial arts club based in Cheltenham, Gloucestershire.  We are a Family business and pride ourselves on our open approach to Martial Arts training.
At our academy we offer classes for children, families and adults in Kickboxing, MMA street self defence and female self defence.

New students of all ages and abilities are always welcome at any of our classes!

Lee Trunks, head instructor at CDA Martial Arts club

Lee Trunks

Lee is Founder of Combined Defensive Arts and instructs at the CDA Academy. Lee has been studying martial arts since he was a child and has been instructing since 2008.
Lee has studied Judo, Karate, Kickboxing and Taekwondo achieving his second Dan Black Belt under master Willie Lim. Lee is an affiliate instructor under Bob Breen in 4d Combat, and an associate instructor in Phil Norman's Ghost Elusive Combat

Helen Overton

Helen and both her children have been training at CDA for years. She is working towards her Black Belt in Kickboxing and is on the Street MMA programme also.
Helen has also studied Jui Jitsu.
Helen runs some of the Children's classes and is Lee's right hand 'Woman' on the mats when he is running the kids sessions, and runs kickboxing classes too.

Michael Davis

Michael is the first person to be award an assistant instructor in the CDA system. He holds several grades in kickboxing from other systems and is currently studying to become an instructor in JKD under John Koeshall.
Michael is one of the few Black Belts in Kickboxing at CDA, you will see him running the Cardio, Kickboxing & S.MMA classes.

Andy Griffin

Griff has been with CDA since the beginning, a 4th degree black belt in TaeKwonDo and a tai chi practitioner, he is also rather capable at kickboxing too.
You will see Griff at gradings or covering the odd class for Lee.

Charlie Whiteway

Charlie has trained in K1, Muay Thai and Freestyle kickboxing. He also was an assistant manager for his university club for 2 years.
You might spot Charlie helping out in our kids classes and the occasional adults & cardio classes too.
"I’ve been kickboxing since I was 14, I started for stress relief and fell in love with it."

Ben Gillett

Ben is originally from Plymouth, but came to Cheltenham as a student in Psychology and he is now completing a Masters in Health Psychology. 
His main motivation to box is maintenance of mental health - "boxing for me is the most powerful and engaging form of escapism, I've always connected to it in a way that I just haven't with other forms of sport."

Heather Graham

Heather has been kickboxing training at CDA since December 2017 but has been doing martial arts since 2009. Heather started karate at university and she holds black belts in both karate and Okinawan Kobudo.

Heather attends our Kickboxing and Street MMA classes and outside of that she also trains in JKD under Clive Elliott and Steve Martin.

Ethan Morris

Ethan is one of CDA's few Black Belts in Kickboxing, he has been training since he was 8 yrs old and is a credit to CDA.
You will see him helping out in the children's classes and running a Cardio K-Box and kickboxing session or two.

Image of the cda team after self defence session
CDA was founded from our passion to access all areas of martial arts and to offer our students a unique blend of techniques and training from around the globe.

By being open to the full spectrum of martial arts you quickly notice the similarities and not the differences in the many different styles. Cross-training allows you to fully explore your own potential as a martial artist without limitations. We want students interested in exploring their own style, and by exposing them to an array of traditional and non-traditional training we aim to develop them into rounded, confident and skilled individuals.

Meet the team>>







Downstairs kickboxing training area


"At CDA we work really hard to create what we call the CDA family, this means that we have each others backs, and are there to offer support both in and out of the gym.  We really want every member to feel part of the family. 
We use our Facebook family group to share our triumphs, stories and news."

Check out our little family on our CDA Family Group page.


Request more information today to find out how you can start your 2 week FREE trial!


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My 8 year old son has been attending for well over a year and absolutely loves his sessions. I highly recommend these classes to anyone who has children interested in attending.

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What an awesome club! Between us we’ve done Ninja skillz, little Ninjas, women’s self-defense sessions, Cardio kickbox and the MMA boot camp – and we’ve enjoyed them all. I would thoroughly recommend CDA.

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My son's confidence and concentration has dramatically increased as a result of attending CDA. Even though no one from his school went he made new friends and I can only attribute that to the welcoming and friendly atmosphere. Thanks to Lee and the team.

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Friendly atmosphere, great teachers would highly recommend. I’ve only been going for a few months and it has made a great impact on, I’ve got more confidence and have made some good friends. Don’t think about joining just do it.

Combined Defensive Arts
Unit 9, Shaftesbury Industrial Estate, 
The Runnings, Cheltenham GL51 9NH

Call Lee on 07852288654 or
Jojo on 01242 437101

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