[The effect of an incentive on isometric muscle training in children].
D000124:Achievement; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009132:Muscles / Q000502:physiology*; D010806:Physical Education and Training; D012054:Reinforcement, Psychology
Uber die Wirkung eines Leistungsanreizes bei isometrischem Muskeltraining von Kindern.