The YKR Ju-Jitsu school offers courses and private lessons of Ju-Jitsu, Self-Defence and “Ginnastica” in Amsterdam. The courses are meant for men, women and kids. Besides the health benefits of a physical activity, a traditional martial art helps people to build up self-confidence, discipline and persistence. Mastering a martial art doesn’t mean mastering a weapon against an opponent, it means mastering your mind and consequently your body. Ginnastica is a term that indicates a variety of sports involving sequences of movements that generally require strength, elasticity, and kinesthetic ability (so-called coordination). It is a perfect exercise to harmonize the body and it can be practice as a complementary course for martial artists.