AGE AND HEAT TOLERANCE.
BUREAU OF OCCUPATIONAL SAFETY AND HEALTH ROCKVILLE MD
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Tolerance to a work-in-heat stress was studied in a group of 40 women and 59 men with an average age of 68 years range 59 through 78 years who were in relatively good health. The stress consisted of 75 minutes of exposure to 92F dry-bulb and 82F wet-bulb temperatures with intermittent work on a bicycle ergometer at increasing levels of energy expenditure from about 500cc oxygen per minute to 1 liter per minute. The responses of the elderly persons were compared to a group of young persons 21 to 23 years of age. The work-in-heat stress produced a greater physiological strain in the women than in the men of comparable age. There were, however, no substantial age effects except in the predicted maximum aerobic work capacity. The results support the conclusion of a previous study of elderly persons that for the heat conditions used in the study age did not appear to seriously handicap the tolerance capacity of the subjects. Author
- Anatomy and Physiology