Gideon Hajioff

Founding Member and Chief Instructor

Gideon founded Dynamic Self Defence in 2001, With nearly 40 years training experience, he has a black belt in Taekwondo, Krav Maga and Choi Kwang Do. Gideon has a degree in Traditional Chinese Medicine and works as an Acupuncturist, Craniosacral Therapist at Chase Lodge Hospital.

He can be found teaching at the Hendon, Stanmore and Ealing schools. In his spare time he is a family man and trains for triathlons (when not riding his motorbike).

Ricardo Edwards


After struggling with weight issues and obesity starting from the age of 8-21 (heaviest weight was 22 stone or 139kg) Ricardo decided enough was enough at the age of 22 and got himself down to the local boxing gym, to get himself fit and in shape, upon doing so developed a love, even a passion, for the fine art of boxing.

He then left the sport for a few years but returned as a fitness instructor who’s niche and skill was to teach the art form that he loves so much in a welcoming, electrifying, energetic fun filled but action packed format designed by himself for all fitness levels, abilities or ages.

James Costanzo


James Costanzo is a all action professional boxer and trainer who has competed in the UK, Italy and USA. Having started boxing at the age of 12 James has 15 years experience in the sport, sparring and training along side champions across the world.

After falling in love with the sport he decided his passion for the discipline should extend to training others and he has trained many fighters and non fighters for competitive and fitness purposes.

The super welter weight will be competing in his 1st professional fight at the famous York Hall and is signed to the renowned Goodwin Stable.

Glen Weinstein


Glen’s journey through strength and conditioning started as a youngster in martial arts. It didn't take long for him to follow his dad into the gym and from the age of fourteen - he was a sponge for information. In 2011 Glen changed careers to follow his passion in this industry.

Since 2011, he’s qualified as a master kettle bell instructor. This is the piece of equipment that Glen believes is key to unlocking someones athletic potential. Aside from the kettle bell qualification, he has also gained diplomas in nutrition, level 3 personal training, posture and pre/post natal training and nutrition.

Glen trains his clients in private sessions as well as with online programs to help people around the world accomplish fitness goals they once thought to be out of reach. The pursuit of excellence in performance is his passion and getting the best out of people is the greatest reward.

Strength and conditioning for UK athletes is behind the curve on the world stage. Glen’s goal is to change that!

Dinu Bucalet

Brazilian Jiu Jitsu

Dinu has been doing martial arts for almost 8 years now and been teaching for approximately 5.

He has competed successfully in MMA both professional (5-1) and amateur (bronze medal World Championship), as well as in Kickboxing also with good results at an amateur level, but his speciality is Brazilian Jiu Jitsu, where he has taken part in countless competitions, achieving great knowledge through the years.

Some of his best results are: Silver medal Jiu Jitsu Ne Waza World Championship, Abu Dhabi Trials Winner, ADCC London Open Silver Medalist, Hungarian Open Champion, Oxford Open Champion,Showdown Series Champion, London Warriors Cup Gold, Multiple times Romanian BJJ cup Champion, Bronze medal Jiu Jitsu Ne Waza European Championship.

Dinu has a great passion in practicing, competing and sharing his knowledge with anyone who is interested to learn. Together he will help you understand the benefits of training and martial arts, and discover the importance of a healthy and active lifestyle.

Silviu Nastasa

Brazilian Jiu Jitsu

Silviu has trained freestyle wrestling since he was seven years old, having been born into a family of wrestling champions. He is the former national wrestling freestyle champion in his home country of Romania.

He is a practitioner and competitor of Brazilian jiu-jitsu GI and NO GI from 2013.

World Champion: 2015 CBJJO blue belt, heavy-weight adult.
Second place on European: 2016 IBJJF BLUE BELT, heavy-weight adult.

Oliver Sweeney

Krav Maga

Oliver is an E2 level IKMF, Krav Maga Instructor with many years teaching experience with both children and adults. He has run his own schools in Ireland for many years and recently moved to London.

With experience in Jiu Jitsu Oliver is constantly striving to develop his skills. We are very lucky to have him on board the KM team.



Zara started gymnastics at the age of eight and moved in to ballet, jazz and contemporary dance. She trained professionally at the Guildford School of Acting gaining a degree in Musical Theatre. Zara then worked within the theatre industry for five years before moving into fitness.

Currently she teaches Les Miills Body Balance, Body Pump and Body Attack as well as Spin and Flexible Strength. Fortunate enough to be invited to 'Presenter Bootcamp' for Les Mills, she was offered the opportunity to work towards being an international trainer.

Having always worked on flexibility through gymnastics, dance and now yoga, she enjoys developing her own stretches and sequences to enable herself and her clients to reach their goals. Zara enjoys strength training, running and Crossfit and have found my flexibility to be beneficial across all workouts. 

Be it for better posture, better olympic lifts or MMA, flexibility contributes to a great extent.

Flexibility undoubtably leads to less injuries; “I bend so I don’t break!"