I alerted Dr. Dan as am hoping for some insight. Why are some guys always getting the hamstring issue & some not. I mean W. Peyton started like 14 zillion games in a row at approx. 195 lbs. I guess I'm asking because it seems like some NFL players are always battling this & it's not a one week thing-look at Fournette. Is there something you can do to lessen the risk of this? What is the deal?????