If you just do one exercise for your core, this should be it. Planks have many benefits for runners. In this episode, I explain the various ways of modifying the standard plank for even more benefit.  Adding this exercise to your cross training, will, I guarantee, impact your running performance and go a long way toward preventing injuries.  With publication of this episode, I’m launching a Plank Challenge. Instructions in the podcast. I hope you’ll participate. It starts on Sunday, May 26th.