Work Enhancement and Thermal Changes during Intermittent Work in Cool Water after Carbohydrate Loading
Technical rept. Feb-Mar 1988,
NAVAL MEDICAL RESEARCH INST BETHESDA MD
Pagination or Media Count:
We evaluated the effect of carbohydrate loading TEST vs control diet CON on the thermal status and the ability of 8 U.S. Navy divers to perform intermittent leg exercise at 80 max Oxygen 2 consumption during head- out immersion in 25 deg C water. Each subject was tested once after 3 days of the TEST diet 600 grams carbohydrateday and once after 3 days of CON diet less than 300 g carbohydrated. The TEST diet included 200-400 grams of glucose polymer solution GPS. Both diets were nutritionally complete and provided 3000 Kcald. A pattern of 10 min rest20 min work was repeated until the diver could no longer complete a 20-min work session or until 8 sessions had been completed. Divers completed more work after TEST than CON. Four completed all 8 work sessions after both diets 3 completed all sessions after TEST, but not CON one completed 7 sessions after TEST and 6 after CON. Differences between diets for O2 consumption, CO2 production, and minute ventilation were not significant.
- Stress Physiology