Oxygen uptake at the beginning of work.
D000328:Adult; D000693:Anaerobiosis; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D009132:Muscles / Q000098:blood supply / Q000378:metabolism; D010101:Oxygen Consumption; D005082:Physical Exertion; D011653:Pulmonary Diffusing Capacity; D012039:Regional Blood Flow; D012119:Respiration; D013147:Spirometry