Changes in Nutrient Intakes of Conditioned Men during a 5-Day Period of Increased Physical Activity and Other Stresses

摘要

Nutrient intakes and selected blood and urinary constituents of 16 Navy servicemen were obtained before and during a period of 113 hours of physical activity, sleep deprivation, and psychological stress, to document the dietary adaptation of physically conditioned men to an extended period of hard physical work and other stresses. Food intakes were monitored by 1-day diet records prior to and by direct observation during the period. The factorial method was used to calculate energy expenditure. Carbohydrates provided 45 and 43% of the total energy intake before and during the experiment. Protein intakes and intakes of all the vitamins and minerals studied exceeded the Recommended Dietary Allowances, both before and during the period. Conditioned men increased food consumption adequately to meet increased energy demands. Keywords: Nutrition; Energy balance; Vitamins; Minerals; Exercise physiology; Reprints. (kt)