Anyone who has gone for a jog on a hot, muggy day knows how miserable it can be — not only because your shirt is glued to your back, experts say, but also because humidity makes exercise much more challenging.
This is because the sweat on your skin doesn’t easily evaporate, said JohnEric Smith, an associate professor of exercise physiology at Mississippi State University.
Sweat itself doesn’t cool you, he said, but rather the evaporation of sweat.
When the air is already thick with water vapor, however, “there’s nowhere for the moisture on our skin to go,” he said.
As a result, humid air makes it harder for your body to cool down.
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JohnEric Smith, “, ”
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Mississippi State University