Fish that live in the sea have found amazing ways to control the amount of water and salt in their bodies, and stay hydrated.
Yes, it's hot outside. And football practice is starting for thousands of kids. But coaches and parents should be careful about tellings kids to drink more water. That has been deadly.
Alcohol has several negative effects on post-exercise recovery and rehydration, and should be avoided after sport and exercise
We've all hear we should drink eight glasses of water per day, but where did that advice come from, and is it outdated?
There's not enough evidence that sports drinks are any better at hydrating you than water.
Here's the science.