Effect van precooling op de lichaamstemperatuur tijdens inspanning in warme omstandigheden [Effect of pre-cooling on the body temperature during physical exercise in a warm environment]
article
Pre-cooling is used with increasing frequency in athletics, because high core temperatures lead to deterioration in performance. This study compared the effects of two pre-cooling methods on the increase of core temperature during exercise in a warm environment. Pre-cooling was accomplished using a cold water perfused suit or by performing light exercise on a cycle ergometer in a cold room. Both pre-cooling methods were compared to resting in a warm room. After 30 minutes' pre-cooling or stay in a warm room an incremental exercise test was performed, until the rectal temperature exceeded 38.5°C. During the first 25 minutes of exercise, rectal temperature showed a slower increase after pre-cooling compared to no pre-cooling, but there was no difference between the different conditions in the time at which the 38.5°C core temperature was reached. The differences in skin temperature between the pre-cooling and control group quickly disappeared after entering the warm room. In conclusion, pre-cooling caused a reduced increase in core temperature during the first 25 minutes of exercise, due to heat storage in cold skin. No differences were observed between the two pre-cooling methods. It is recommended that exercise starts as soon as possible after the pre-cooling period, to realise the beneficial effects. The effect of pre-cooling on performance should be determined separately for each individual athlete.
TNO Identifier
10932
Source
Geneeskunde en Sport, 34(2), pp. 64-69.
Pages
64-69
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