title: [Health and educational problems of the extracurricular activities of school children].
mesh_terms: D000059:Accidents; D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D007899:Leisure Activities; D008297:Male; D010806:Physical Education and Training; D012572:School Health Services; D012800:Siberia; D013177:Sports
vernacular_title: Gigienicheskie i pedagogicheskie problemy vneshkol'noĭ deiatel'nosti uchashchikhsia.