Quote Originally Posted by GLC1968 View Post
What do you guys think muscles pump up with? Air? It's water! (or fluids anyway)! For every molecule of glycogen in your muscles, there are two molecules of water (I think that's the right ratio). It's different than general body bloat that you might get from salty foods or hormones...

And yes, I get this in my legs too. I would NEVER do a heavy lower body workout (or a tough hill-climbing ride) the day before weigh-ins as my legs can hold onto fluid for a couple of days after a tough workout. For others, it's just overnight. Depends on your body.
Glycogen binds about twice its weight in water. But if you're burning that glycogen...Time to go find a physiology book rather than a biochem book. I suppose it just sits there for a bit until the cells get rid of it?