Greg Glassman distills anatomy and physiology into a framework so simple that any athlete can grasp it—and any coach can teach it. His model focuses on just four body parts (spine, pelvis, femur, tibia), three key joints (knee, hip, and sacroiliac), and two movements (flexion and extension). Once athletes can identify and control these, Coach introduces three rules of biomechanics: keep the trunk stable, generate power through hip extension, and avoid “muted hip function,” when the pelvis moves instead of the hip. The result is a shared language that sharpens communication and builds more coachable, efficient athletes.

https://brokenscience.org/anatomy-and-physiology-for-jocks/