Acclimatization of older men to work in heat.
D000064:Acclimatization; D000328:Adult; D000375:Aging; D001831:Body Temperature; D006339:Heart Rate; D006358:Hot Temperature; D006801:Humans; D008660:Metabolism; D008875:Middle Aged; D005082:Physical Exertion / Q000502:physiology*; D013546:Sweating / Q000502:physiology