title: Varied responses to severe physical training demonstrated by three middle-aged men.
mesh_terms: D000328:Adult; D001810:Blood Volume; D004906:Erythrocyte Count; D006454:Hemoglobins; D006801:Humans; D008297:Male; D008875:Middle Aged; D010806:Physical Education and Training; D011653:Pulmonary Diffusing Capacity; D014797:Vital Capacity
chemical_list: D006454:Hemoglobins