The winter is behind us and we're onto warmer days and sunnier skies. And in honor of the Boston Marathon, April is dedicated to all you runners out there. Our theme is Return to Run Exercise:  How to Forward Step and Stick Purpose:  To introduce plyometrics in a forward locomotive motion Who It's For:   Weekend warriors, marathon runners, adults with kids that now walk Why We Love It:   Because we know your knee hurts when you run and we want to help you get strong and agil