title: Relationship of beta-adrenoreceptor density to fitness in athletes.
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D008214:Lymphocytes / Q000502:physiology; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D010809:Physical Fitness; D011941:Receptors, Adrenergic / Q000502:physiology*; D011943:Receptors, Adrenergic, beta / Q000502:physiology*; D013550:Swimming
chemical_list: D011941:Receptors, Adrenergic; D011943:Receptors, Adrenergic, beta