Thermoregulatory Responses of Middle-Aged and Young Men During Dry-Heat Acclimation
Abstract
Thermoregulatory responses during heat acclimation were compared between nine young and nine middle-aged men who were matched for body weight, surface area, surface area-to-weight ratio, percent body fat, and maximal aerobic power. After evaluation in a comfortable environment, the men were heat acclimated by treadmill walking for two 50-min exercise bouts separated by 10 min of rest for 10 consecutive days in a hot dry environment. During the first day of heat exposure performance time was 27 min longer for the middle-aged men, whereas final rectal and skin temperatures and heart rate were lower, and final total body sweat loss was higher compared with the young men. These thermoregulatory advantages for the middle-aged men persisted for the first few days of exercise-heat acclimation. After acclimation no thermoregulatory or performance time differences were observed between groups. Keywords: Aging; Blood responses; Exercise-heat tolerance; Heat acclimatization; Perceptual responses; Physiological responses; Sweating responses; Temperature regulation. Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1988
- Accession Number
- ADA199142
Entities
People
- Andrew J Young
- Bruce S. Cadarette
- Kent B. Pandolf
- Michael N. Sawka
- Ralph P. Francesconi
- Richard R. Gonzalez
Organizations
- United States Army Research Institute of Environmental Medicine