my left knee is hurting I still ride a bit and am wondering if that hurts or helps my knee. I stopped trying to ride with the local club cuz I can't keep up and am dnf off the back. I am going to be 72 in Feb. the left leg was badly broken in 1980 due to being hit by an 18 wheeler, in fact I was dead. they resuscitated me with defrib. mostly my left leg has been ok for over 30 years but now it wants to buckle under me.