Does carrying ice in your hands actually cool you off enough to improve performance in hot weather?
Now we’re going to take a closer look at how much heat you naturally produce and expel during exercise. That will serve as our basis of comparison when determining if particular types of cooling garments actually live up to expectations.
All other forces being equal, nothing slows an athlete down more than the gradual buildup of heat in the body. To avoid overheating (and death!), the body has a variety of ways to dissipate heat during exercise. And here they are.
How does the body deal with heat during a race?