title: Effects of a competitive endurance training program on self-concept and peer approval.
mesh_terms: D003163:Competitive Behavior; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D010379:Peer Group; D010806:Physical Education and Training; D010809:Physical Fitness; D011581:Psychological Tests; D012649:Self Concept; D013177:Sports