Effect of prolonged stay at altitude (4000 m) on autonomic balance.
D000064:Acclimatization; D000328:Adult; D000531:Altitude; D001341:Autonomic Nervous System / Q000502:physiology*; D001794:Blood Pressure; D001831:Body Temperature; D003080:Cold Temperature; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008297:Male; D012119:Respiration; D012463:Saliva / Q000378:metabolism; D012472:Salivation; D012881:Skin Temperature; D013997:Time Factors