Well saturday morning I woke up weighting 90lbs as usual, after that I ate my regular healthy breakfast that would fuel me up for my 5k that I ran that morning. During the race ( 3miles) i went through i really big hill and ran as fast as I could I pushed myself very hard even though it was very hot outside, after i got done with the race I went home checked my weight and it was 95 lbs! can anybody explain to me why this happened? and how do i get rid of it?