Het boek is een must voor al diegene die ju-jitsu gestructureerd, verantwoord en veilig willen doceren.

Ju-jitsu is not a sport, but a way of life. When you come to train in my ju-jitsu school you start an education, no obligation to do sports and learn tricks, tricks and tricks but a thorough training of your physical and mental resilience. You can train to a certain level or practice ju-jitsu as a life path, even into your old age.

The Coolen Basic Training System is a follow-up to the Coolen Basic Attack System in which the responsible basis is laid for a development to the 1st Kyu (brown be...