Energy Metabolism in Cold-Stressed Females: Implications for Predictive Modeling
Abstract
This document is a progress report which describes the results from the second of a series of studies carried out to clarify the extent of gender-related differences in physiological responses to cold stress, and to evaluate the potential implications for survival time in the cold. Specifically, this study was designed to compare substrate utilization during light (LI) and moderate (MI) exercise performed in both cold and comfortable ambient temperatures. The objectives were to quantify M, lipid and carbohydrate oxidation rates, and muscle glycogen utilization during light and moderate exercise in the cold versus comfortable ambient temperatures and to compare these results with those previously collected in males who underwent the same protocol. Two groups of females performed either low or moderate intensity exercise at 9 and 21 deg C. M was significantly higher (13%) during exercise in the cold in LI but not MI. In contrast to males, this was not associated with greater muscle glycogen utilization. The relative contribution of carbohydrate, fat, and protein oxidation to fueling M was not different between groups or exposures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1998
- Accession Number
- ADA364172
Entities
People
- Ira Jacobs
Organizations
- Defence Research and Development Canada