I agree GLC, trail running doesn't hurt as much and is more interesting If I could just persuade my heel to stop complaining...

Yesterday we played a sprinting game in my Funday workout - it was a relay race but to make it more interesting one group were "zombies" and while we were both running the same direction, the zombies goal was to catch someone from my group. I literally have NEVER run that fast in my life, and I think I must have been hitting the basketball court pretty hard for my heel was very p'ssed off for the rest of the day. Today my quads are even sore - sprinting ALWAYS makes me hurt for a day or two. Deadlifts, back squats, box jumps, whatever - other activities rarely make me sore but sprinting is very consistent that way.