Difference between plantar plate stress and strain

I know I talk a lot about how necessary it is to reduce the stress and strain on the plantar plate ligament when you are a runner, especially if you are trying to get ready for a race while healing.  

It is really difficult to do, but not impossible. 

What are the four forms of stress and strain that can affect runners with plantar plate injuries? 

Well, that is what we're talking about today on the Doc On The Run Podcast.