This is such an interesting and important discussion, between two of the leading experts in fixing the root cause of most physical pain. The key idea presented is that "structural deterioration" can be reversed. At any age. Sometimes quickly.
Jason Conviser has a PhD in Exercise Physiology and Dr. Yoni Whitten has an undergrad degree in Exercise Physiology. They understand how the body works better than anyone, and also understand how to get the body working again, with strength and mobility.