What I failed to mention in yesterday's post about my new 5K PR is that I blew out my right hamstring at the beginning of the race. This hamstring/glute gives me grief every summer (marathon training time) and it had been acting up on and off for weeks. On Saturday, I'd almost reached the one-mile marker when I felt a big "POP!" at the back of my thigh and behind my knee. 

There was a moment of panic, then for a second I thought maybe the pop had actually released the hamstring because it felt good, then I took another few steps and returned to panic. The hamstring hurt. 

But the beauty of a race is your adrenaline is flowing and your attention is easily diverted. I kept running and it was fine. Until I stopped.