I'm amazed at the mileage I've put in over the last couple of weeks without any real problems (knock on wood). I did 24 miles yesterday and 32 today and feel good. I've tried to straighten my back more (like he does in the video) when I'm running and getting my feet to land flatter and under my hips more. I've been able to run faster just by doing this. Most of my long runs have been around 7:50 - 8:00 per mile but I averaged yesterday's 24 at 7:24 and today's was 7:22. Go figure. Ran the first two hours today without music to start getting into Belgium-mode where they don't let you have ipods during the World events.