Well, Gary Reed just supplied HIS answer to your question, which I'm relieved is the same as was mine:
"The motivation to do all those little things you need to do - eating right, getting your sleep - just wasn't there. You can't be successful in track and field without doing the little things. It's an all-consuming, 24/7 lifestyle. I love track and field, but it's not something you can just hang around and do and be good at ..."
Exactly.