I want to know about the glycogen stores. Why is it important to have it full for a 100m race? I have read you can lose 2kg very quickly if you empty the stores, mostly losing water weight.
What would happen, is the 3% body weight decrease not worth it even for a short burst activity?
Also what would happen if you do the usual bodybuilder/powerlifter thing where you lose loads of water weight in the last few days? Ive heard of guys losing up to 10kg.
If you empty your glycogen stores, you will feel like crap, and it affects you mentally too. They dont have to be full, but at a fairly decent level (in my opinion).
If you lose loads of water, you will also feel like crap, and not perform well. Bodybuilders stand and pose. Sprinters move as fast as they can.