not sure if this is the right forum for this, or if anyone will be interested, but, here goes... friend and i were having a discussion about a mutual friend, we can call them friend A and Friend B respectively. friend B used to be morbidly obese, over the last four years, hes gotten into competetive cycling, and lately hes gotten quite good. hes lost 250 pounds, more or less. so friend A has a theory. he thinks friend B is doing so well in bike racing becuase when he was fat, his heart had to work extra hard, and now, its a bigger muscle than normal for a person of friend Bs new size. any way that theory has some validity to it?