I am 18 5"9... skinny 140 pound ish, , i do pushups & situps, and like no muscles , i dont have fat lol, i have Abs... & i tried working out the whole summer, didn't help, just got me a little stronger, doesn't matter how much I eat , i just seem to not be able to gain mass , or any muscles. SO I came here for last help -_-.. I need something.. & that's why im here , someone help me ,