Regular heat exposure can force your body to adapt—improving sweat rate, blood volume, and cardiovascular strain. But are there limits to how much you can do?

The sweet spot seems to be between 15 and 35 minutes. A lot of runners use heat sessions for about a week leading into a ...

Arguably the worst thing about training for a fall half or full marathon? The peak of your training typically coincides with the hottest days of summer. While that can put a real damper on your ...

Running an entire marathon takes a lot of energy. Neuroscientist Carlos Matute knows this: he's run 18 of them. He wondered how runners' bodies get the energy they need to make it to the finish line.