title: A comparison of the reproducibility and physiologic response to three maximal treadmill exercise protocols.
mesh_terms: D000328:Adult; D006334:Heart Function Tests; D006339:Heart Rate; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D010101:Oxygen Consumption; D005082:Physical Exertion; D013997:Time Factors; D014797:Vital Capacity