How bad is Grade 3 Stress Fracture?

Today's episode actually comes from a podcast listener who had a question: 

"I got an MRI just to give me the green light to resume training and it showed a grade three stress reaction of the left tibia. Do you think I can run?" 

Deciding whether or not you can run with a stress fracture really depends on understanding how bad it was when it started, and how bad it is right now. 

How bad is a grade three stress fracture? Well, that's what we're talking about today on the Doc on the Run podcast.