Will cycling help my running fitness while injured?

I was just on a telemedicine call with a recovering runner. He asked me about different forms of training that he could do to maintain his running fitness, while he fully healed the injury.

He asked a question I get all the time, "Is cycling really helpful or not?" 

Well, the short answer is yes, it is very helpful for several reasons.

Today on the Doc On The Run podcast, we're talking about whether or not cycling will help maintain your running fitness while you're injured and recovering.