3 ways stress fracture in a runner turns into non-union

One of the most common injuries I see in runners is a stress fracture.  All overtraining injuries in runners are stress induced injuries and a stress fracture of course implies too much stress applied to the bone.  A stress fracture is not a problem that you get not because you ran too much, not because you ran too far, or too soon.  Stress fractures only result when your training exceeds the bone's threshold to recover before your next workout. If you keep doing that, it could get much worse.  What are the three ways a stress fracture can turn into a non-union in a runner?  Well, that is what we're talking about today on the Doc On The Run Podcast.