FWIW: I wore out my knees running track at 16. I could not run due to knee pain. Changing my stride to land and push off the front of my foot allowed me to ru

FWIW: I wore out my knees running track at 16. I could not run due to knee pain. Changing my stride to land and push off the front of my foot allowed me to run again, until other issues sidelined me.