Ключевые слова: activity, american, attacking, boy, child, childhood, children, competition, defending, defense, energy, european, exercise, exercising, female, fight, fighting, german, girl, group, gym, hardy, indoors, judo, karate, kick, kimono, male, move, pair, position, practice, preteen, protection, schoolchild, self, selfdefense, skill, sparring, sport, sporty, strength, taekwondo, team, technique, teenager, training, workout,