 What also happens when you're exercising the heat because you have that increase in whole body temperature is that your maximum power, your maximum aerobic capacity or your VO2 max, your VO2 max kind of decreases progressively with hyperthermia. So to keep pedaling hard, a rider needs to send tons of blood to their heart. But to cool down, their blood needs to go toward their skin where sweat or wind can cool it off. It's