Fitness and sweat

[OakLeaf]

I've heard the maxim many times that if you don't have to pee every hour, you're dehydrated. But I don't know whether that's an urban legend or really has scientific support. It makes sense that if you're not peeing, your kidneys aren't detoxifying your body the way they're supposed to.

Training and racing are two different things obviously. In a race I really try to walk that narrow line between having to pee vs. getting so dehydrated it affects my performance (which happens when you've lost as little as 2% of your body weight). Then there's a limit to what I can carry on my back on a long training run, and a limit on how many places there are where I can refill my vest. But to actually keep up with hydration, I'll sweat out a liter an hour on a COOL day. Yoga is a good indicator because there's no air movement to evaporate the sweat ... at the end of a practice my absorbent mat will be absolutely drenched.

I sweat. I really sweat. I like to read things that say that that means I'm fit. But it means I have to work extra hard to keep up with electrolytes.