title: Enzymatic and circulatory adjustments to physical training in middle-aged men.
mesh_terms: D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000098:blood supply* / Q000201:enzymology; D010101:Oxygen Consumption; D010806:Physical Education and Training; D012039:Regional Blood Flow; D013385:Succinate Dehydrogenase / Q000378:metabolism*
chemical_list: D013385:Succinate Dehydrogenase