title: Population-based reference standards for cardiovascular fitness: an unanswered question.
authors.forename: Roy J
authors.initials: RJ
authors.lastname: Shephard
mesh_terms: D000328:Adult; D015992:Body Mass Index; D002320:Cardiovascular Physiological Phenomena; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D010101:Oxygen Consumption / Q000502:physiology; D010809:Physical Fitness / Q000502:physiology*; D044469:Racial Groups; D012016:Reference Values; D014481:United States