Wright, G., Pascoe, D., & Grandjean, P. (2005). Thermoregulatory responses to intermittent sprint exercise in the heat following creatine loading. Medicine and Science in Sports and Exercise, 37(5), Supplement abstract 1002.

Active, heat-acclimatized males (N = 10) performed a 30-minute low-intensity warm-up followed by 6 x 10-seconds maximal effort sprints on a cycle ergometer in the heat (35C) following six days of 20 grams of creatine per day. Another condition was a similar amount but of maltodextrin.

No significant performance changes due to creatine ingestion were noted. Body mass, presumably due to greater water retention, increased in the creatine condition. Creatine did not affect the sweat response, relative plasma volume changes, or thermoregulation.

Implication. Creatine does not alter thermoregulation in the heat but does increase body mass over the period of supplementation.

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