I have been having some knee pain while doing the C25K program, so even though I just bought new tennis shoes a few weeks ago, I decided I needed to see if some better (or the right kind of) shoes could help. So Thursday I went to a running shop and discovered that I needed some shoes with more support. So I got these. I can really tell a difference. Today I wore these new shoes to run a 5K in Tampa. My knees are grateful for new sneakers.