title: Metabolic modifications caused by sport activity: effect in leisure-time cross-country skiers.
mesh_terms: D000328:Adult; D001772:Blood Cell Count; D001774:Blood Chemical Analysis; D003402:Creatine Kinase / Q000097:blood; D006801:Humans; D008297:Male; D008660:Metabolism; D008875:Middle Aged; D012865:Skiing; D013997:Time Factors
chemical_list: D003402:Creatine Kinase