Food Components to Enhance Performance An Evaluation of Potential Performance-Enhancing Food Components for Operational Rations (1994) / Chapter Skim
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3. Nutritional Enhancement of Soldier Performance at the U.S. Army Research Institute of Environmental Medicine, 1985-1992
3. Nutritional Enhancement of Soldier Performance at the U.S. Army Research Institute of Environmental Medicine, 1985-1992
Pages 65-76
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Army Research Institute of Environmental Medicine, Natick, MA.
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The U.S. Army Research Institute of Environmental Medicine has investigated the application of some of these sports nutrition and nutritional neuroscience principles on soldier performance at high altitudes, in the cold, in the heat, and in conjunction with load-bearing work.
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Under the conditions of the study, there was no significant difference in hiking times at the beginning or end of the 3-week altitude exposure period, although the carbohydrate supplement did significantly increase total dietary carbohydrate intake (Baker et al., 1990~.
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They found that the low muscle glycogen levels associated with the low dietary carbohydrate intake did not impair the rewarming time during passive rewarming and suggested that individuals suffering from mild hypothermia rewarm spontaneously despite significant muscle CHO depletion. This study thus provided little evidence for a critical role of CHO in the rewarming process.
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The relatively low level of carbohydrate used in the study may account for the lack of an anticipated ergogenic effect; however, it is also possible that the nature of the sustained work test chosen for this study contributed to the lack of sensitivity to carbohydrate. Foot and leg soreness, chafing, blistering, and heat rash, rather than exhaustion were the main reasons for terminating the sustained treadmill walking.
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on the endurance times of eight test subjects on a cycle ergometer (80-85 percent VO2 maX) at sea level, after 1 h of simulated altitude (4,300 m)
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. acute altitude exposure in the altitude chamber, the mean endurance time of the caffeine treated group increased 54 percent relative to that of the placebo group (22.8 + 6.9 versus 35.0 + 10.7 mini P ~ 0.011.
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(1989) show that caffeine can increase physical and mental performance under carefully controlled laboratory conditions; they do not, however, show that a similar effect will be present under field conditions.
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CURRENT USARIEM NUTRITION AND PERFORMANCE ENHANCEMENT RESEARCH The U.S. Army Research Institute of Environmental Medicine is currently engaged in research employing glycerol to achieve hyperhydration at high altitude and in the cold to combat altitude- and cold-induced diuresis and dehydration.
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S Army Research Institute of Environmental Medicine.
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Pandolf 1989 Thermoregulation during cold water immersion is unimpaired by low muscle glycogen levels.
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