INTERNATIONAL
SELF DEFENCE
SCHOOL BELGIUM
NEW SCHOOL YEAR 2026–2027
Start Training in September —
First Lessons Free for Newcomers!
Curious about ISDS? New participants are welcome to join one of our opening lessons completely free of charge and experience our training without commitment.
LEUVEN
Tuesday, 1 September
18:30–20:00
PUTTE
Wednesday, 2 September
19:30–21:30
This special opening offer is exclusively for newcomers to ISDS.
Practical Self-Defence for Real Situations
Self-defence and martial arts training in Leuven and Putte, adapted to every participant’s abilities and experience.
Our goal is to educate the public to maintain a certain awareness in the matter of "feeling safe whatever the situation may be".
We, therefore, teach several disciplines of Martial Arts (pure and mixed):
(Boxing-kicking-trapping-throwing-ground fighting and weaponry).
PUTTE
Wednesday
19:30–21:30
TRY A LESSON
€10 per lesson
No commitment
NEW WORKSHOPS
UPCOMING WORKSHOPS AT FLOW STUDIO LUBBEEK
Resilience & Self-Defence Workshop
For Young People Aged 11–16
A practical, hands-on workshop helping young people become more confident, aware and prepared for challenging everyday situations.
Participants learn how to recognise potential danger, avoid and de-escalate conflict, communicate assertively, set clear boundaries and safely escape from simple grabs or threatening situations. They also learn when it is best to leave, seek help or physically defend themselves.
Next date: 30 August
Time: 14-17h
Duration: 3 hours
Location: Gellenberg 4, Lubbeek, Belgium, 3210
Price: €59 per participant
Find the Training That Suits You
WEEKLY MARTIAL ARTS TRAINING
Train in a different martial arts system throughout the school year—from groundwork, kickboxing and Escrima to Thai boxing, Wing Chun, Jeet Kune Do and ISDS.
WOMEN’S SELF-DEFENCE
Practical workshops focused on awareness, setting boundaries, building confidence and effective self-defence.
WORKSHOPS & BOOTCAMPS
Discover hands-on self-defence workshops and intensive training programmes for different ages and experience levels.
More Than 45 Years of ISDS
Founded in Belgium in 1980, the International Self Defence School has more than four decades of history in practical self-defence and martial arts training.
Throughout the years, the school has continued to develop by bringing together knowledge from different martial arts traditions while remaining focused on realistic and effective self-defence.
This rich history is reflected in the ISDS logo, which brings its core martial arts systems together within golden circles symbolising personal growth, continued learning and the wider world of martial arts.
Sifu/Guro Patrick Van Vlasselaer
More than 50 years of martial arts knowledge and experience
Patrick began his martial arts journey in 1970 and has spent more than five decades studying,
practising and teaching a wide range of martial arts and self-defence systems.
He is a direct and active student of the internationally renowned Guro Dan Inosanto, who trained directly under Bruce Lee.
Patrick holds the qualification of Full Instructor Level 15 in Jun Fan Gung Fu–Jeet Kune Do and Filipino Martial Arts.
Throughout his long career, Patrick has trained with many highly respected masters and instructors. Their knowledge, combined with his own extensive teaching experience, forms the foundation of the diverse and practical training offered at ISDS.