The Polarized Model of Running

The polarized model, okay, came kind of like codified and named in the early 2000s. This was in response to the paradigm at that time, John, which coming out of the 90s was lots of in of the O2 Max work and not much easy work. I call it rock and roll running like it was just rock and roll, we're rocking and we're rolling today. Let's go baby.