Haymes, E. M., Sharp, R., Hackmeyer, J., Vihlen, A., & Moore, M. A. (1999). Effect of clothing fabric on selected physiological responses to exercise in a hot, humid environment. Medicine and Science in Sports and Exercise, 31(5), Supplement abstract 910.

Ss (N = 8) cycled at 50W for 60 minutes in a heat-controlled environment (35.3 degrees Celsius; 65.1% relative humidity) on two occasions, one week apart. For one trial, a 100% cotton T-shirt and shorts were worn. On the other trial, a 50/50% blend of cotton and polyester fabric for similar clothing was worn.

Ss rated the blend fabric to be more pliable and thinner. There was no difference between the fabrics for sweat absorption and retention or heat loss.

Implication. Cotton and cotton blend fabrics have similar affects upon performance or heat regulation when exercising in hot environments. Preferences for the "feel" of the blend fabric were registered.

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