How can i reduce my Brest size?

if i start working out a lot and built up my muscles around my arm and stomach area would that reduce my a bit because I'm not really fat but I'm not skinny ether so i don't know how much of them are fat. Also my s aren't really that huge their about a small c cup but i want to look more guyish and although binding sounds good it seems it would get kind of tiresome and painful and i don't know if i would want top surgery.