Sweat and Exercise
What Your Sweat Says About You
The details on your body's cooling system and what sweating, or not sweating, says about your performance
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How Sweat Works...And When It Doesn't
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If Your Sweat Stinks...
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If Your Sweat Pours...
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If Your Sweat Stains...
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If Your Sweat Stops...
How Sweat Works...And When It Doesn't
Image: Getty Images
When It Works
Sweat is like central AC for your body. On hot days or as you're grinding up a hill, glands under the skin produce sweat and send it to the surface, where it evaporates. Each drop that turns to vapour pulls heat away from your body, and you feel cooler. The hotter you get, the more you sweat.
Search: How do I stay properly hydrated during exercise?
When It Doesn't Work
On days when there's a lot of moisture in the air, sweat can't evaporate as quickly, making it harder for your body to cool off. This is why heat-related problems like cramps, exhaustion, and heatstroke are more common in humid environments than in dry ones.
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