I just returned from a beautiful weekend in Boone, North Carolina. If you know the area, you may know that Boone is mountain territory. I spent 3 days walking up and down mountains. My calves were TIGHT after this trip. I knew I needed to pay attention to them but the point was driven home to me when my knee started hurting too. My very tight calf was causing other parts of my body to say Uncle!
Balls to the rescue!