The Effects of Heat on the Brain

When you exercise in hot conditions, and I force you to run at 12 kms an hour or cycle 250 watts for as long as you can. You almost always fail voluntary exhaustion at a core temperature in and around 40 degrees Celsius. That's kind of like the human set point for exercise failure. For most healthy people, we don't go beyond 40 by much. We stop. We say, she's up to I can't anymore. So that's what happens when our brain overheats. But what we were saying back then was that maybe there's regulation before the brain gets hot. Frank Marino had found that smaller runners could pace themselves more evenly in the heat than bigger runners. The