I’ve rested my legs for a couple of weeks and taken a course of ibuprofen. Today I try a little 4-mile round trip to one of our local coffee shops to see how walking feels. The results are mixed. My knee feels fine, but my left hamstring has odd, subtle pull in it that seemed to start when I was stretching every day. It will take a longer walk to tell if this is just tightness or a worse problem.