I hurt my right hamstring when I did the River Run last April so I've been taking it easy for a while hoping it would get better. It hasn't. A week ago Tuesday I went for a 3-mile barefoot run. You see those dark spots on the pads of my feet, especially the one on my right foot? Those were the blisters I got on that run. That hamstring was throwing my stride off bad enough for me to get blisters on a short run. That hasn't happened since I started running barefoot three years ago.