28 May '14, 12am

Should you sip on hot or cold drinks to stay cool? The answer may surprise you:

(Oh, and one final note: the drinks in this study were carefully chosen to avoid causing a big change in body temperature (i.e. small amount, relatively modest temperature difference). But that doesn't mean it's not possible to actually affect core temperature, which is why drinking slushies is a different question entirely. The researchers cite some interesting studies from the early 1970s by Nadel et al. in which subjects were given either ice cream or hot pudding. In that case, the hot pudding supplied a heat load that was seven times larger than the warm drink in this trial, and ice cream caused a heat deficit five times greater than the cold drink. As a result, the subjects did indeed show changes in sweat rate, but they also showed changes in core temperature, which made it impossible to be sure what caused the sweat changes.)

Full article: http://www.runnersworld.com/hydration-dehydration/hot-dri...

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