i have to agree with bob being an old cross country star myslef (cough cough)!!! just watch that time it will amaze you what your body is capable of, especially when it is in need like yours is. I always wondered why i always performed so good in competition. It is just your body telling you what it is capable of. If it says a eight minute mile then do it. If it says five minute mile do it. Just listen to your body and know when do say no without giving up. Kind of an oxymoron huh?!?!? Best of luck big guy
josh