Food Deprivation and Exercise in the Heat: Thermoregulatory and Metabolic Effects,
Abstract
To determine the effects of food deprivation on the physical, physiological, and metabolic responses to exercise in the heat, adult, male rats (330-360 g, N=16/group) were food-deprived for 24, 48, or 72h. They were then exercised (9.14m/min) in the heat (35.5 deg C) to hyperthermic exhaustion (Tco approx. 43 deg C). Food deprivation had no effects on endurance, but ad lib fed controls manifested significantly (P < or = .05) increased Tco and Tsk during the latter portion of the treadmill interval. Prolonged food deprivation (48 and 772h) resulted in significant (P < or = .01) hypertriglyceridemia and hyperlactacidemia subsequent to exercise. Levels of sodium, potassium, urea nitrogen, and creatine phosphokinase were unaffected by the food deprivation intervals. We have concluded from these studies that while several thermoregulatory and metabolic responses to exercise in the heat can be significantly affected by food deprivation, short-term endurance capacity was unaltered.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 05, 1984
- Accession Number
- ADA148847
Entities
People
- R. P. Francesconi
- R. W. Hubbard
Organizations
- United States Army Research Institute of Environmental Medicine