Single most effective but most neglected tool to run earlier after injury

Almost all runners who call me for a consultation have one thing in common.
 
The number one thing they want to get out of their discussion with me is “How can I start running sooner? I want to get back to running so I don't lose all my running fitness.”
 
There is one free and highly effective tool you can use as an injured runner, but most of the runners I talked to seem to be completely neglecting and ignoring it.
 
What is the single most effective but most often neglected tool injured runners can use to get back to running sooner?
 
Well, that's what we're talking about today on the Doc On The Run Podcast.