Exercising in hot weather puts extra stress on your body. If you don't take care when exercising inthe heat, you risk serious illness. Both the exercise itself and the air temperature and humidity can increase your core body temperature.To help cool itself, your body sends more blood tocirculate through your skin. This leaves less blood for your muscles, which in turn increases yourheart rate. If the humidity also is high, your body faces added stress because sweat doesn't readilyevaporate from your skin. That pushes your body temperature even higher.==舒适应该是比较好的 太热太冷都会给身体增加许多风险不是很好的能纳入运动的处方这篇的study我觉得特别有意义
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