hi all, i am 5'11 155 and 6-7% body fat. back in my pro bike racing days i was like 138-`40, but suprisingly after quitting and going back to running after a 7 yr break to race bikes, i gained like 12 lbs in muscle, weird huh? you don't have to be rail thin to go fast, I run low 15 for 5k. now. p.r. in college was 14:12. i mostly do 10k and half marathons now, and manage high 31, low 32 in the 10 and 1:12- 1:14 in the half mostly. so runners with some meat rejoice!!!!! bye the way, have you ever seen ryan shay? he is solid also and runs like 1:03 for the half and 2:13ish for the full. i remember watching him when he was in h.s. and he was never thin, actually a really strong frame, and almost a football player neck, but could he fly!!!! and still does