ok let me put it in simple terms for an idiot like you 
Take it as endorphins are sadness.
After you do sports, you sweat out ur endorphins.
meaning you sweat out ur sadness.
so after that you will be happy?
understand bo knn mustafa centre uni grad? 
erm...actually endorphins are hormones that make you happy...you
don't sweat them out...they are released into your bloodstream in
times of stress and danger...
In addition to decreased feelings of pain, secretion of
endorphins leads to feelings of euphoria, modulation of
appetite, release of sex hormones, and enhancement of the immune
response. With high endorphin levels, we feel less
pain and fewer negative effects of stress.
ok the 2 of you can continue fighting now 