I've been a rock climber, an avid cyclist, an amateur triathlete, a devoted yogi, and I spent more than twenty years in classical vocal training. No surprise that I accrued more than my fair share of injuries and surgeries.
So I found myself immersed in teaching pilates after exploring it for my own chronic body issues. Also no surprise that I found myself working with people who helped me understand what I needed to learn for my own physical progress- people with chronic movement dysfunctions and pain... aka problems.
And there it was, the big system problem I had been training for my whole life. The human movement problem. I spent the next fifteen years devoted to gathering as much continuing education as I could.
This led to a puzzling issue- lots of conflicting information. However, chronic pain presents some interesting feedback. Consistently, the more functionally accurate a movement is the less pain it causes. So if you have conflicting pieces of information: one that exacerbates pain in almost everyone and one in almost no one, it's not hard to decide which is probably correct.