Thanks for the reply. I was pondering the blood flow issue, too. Nothing too tight, so since I can't figure it out, I will go to the medicine man. Oh, these 50's are something else, but the best if you embrace them! BTW, I "wun" - a little running and a lot of walking with a focus on actual racewalking technique. Kept a good pace average (for me) of under 15 minute miles for 13.1 miles. Those last 2 were killers, though. Thought we'd never see the end and then had to walk a mile back to the train station!

Go run around the block and sign up for a 1/2!