Shin drop, pronation, and spinal engine for speed (how to evaluate training ideas part 1)

Principles: Human motor learning is largely subconscious. Observing a movement trait does not mean it needs to be coached. Variations in mechanics exist and are largely acceptable. Sometimes it’s wise to try to push toward some end of the spectrum. Often it is not wise. Jump Science training programs: https://www.2xathlete.com/