ALTITUDE CHANGES FUEL USE
Butterfield, G. E., Mazzeo, R. S., Reeves, J. T., Wolfel, E. E., & Brookes, G. A. (1996). Exercise responses at high altitude: The Pikes Peak 1991 experiment. Medicine and Science in Exercise and Sports, 28(5), Supplement abstract 1.
Performance at high altitude (4,300 m) primarily uses carbohydrate, rather than lipids (fats), for fuel. Since carbohydrate is not as abundant as fat in the body, constant and sufficient carbohydrate replenishment is necessary for survival.
Implication. The demand for carbohydrate is modified as altitude becomes more moderate. However, because of variations in the sensitivity of individuals to altitude stress, fluid and carbohydrate replenishment should be emphasized more than at sea-level.
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