In a study done on pitching and throwing mechanics, researchers found that greater gluteal activation in a throw results in greater core stability, which leads to higher throwing velocities… AKA a stronger arm.
This makes sense because when you throw, power is transferred from your legs, through your torso, and into your arms. If your torso isn’t stable, that power is lost, and your throwing velocity will suffer.
Players who can’t control their torso stability are at HIGH risk for injury.
This is why I start with the structure. It creates proper movement patterns that lay a solid foundation to build dynamic strength, power, and explosiveness upon.