[EdZ]

The Source of Power in the Swing:

IMO it is the 'leverage' you create with your shoulders and arms, and the 'speed' you create in the wrists (transfer power).

Specifically the 'long lever' you have - your arm span - which creates a class 1 lever over your center, between the shoulders on your back. This lever gives you MASS when properly utilized (keep the "7" per Austin). The center of mass is a point on your back, not sternum, which you turn 'around' during the swing.

It is this lever that lead many to say it is the 'right shoulder' or the 'right hand' that provide the power - the right hand is one end of the lever, the left hand is the other.

Lever 1 - class 1 lever - shoulders arms hands - give MASS

Lever 2 - class 3 lever - wrists - give SPEED

Remember FORCE is both MASS and SPEED

You need both, most don't have mass because they are out of sequence (throw away)

The entire body, ideally, supplies the force to move lever 1, by moving the shoulders, which supply power to lever 2 through transfer power or simple flail like release.

The power of the body is transfered "along the chain" from the ground up, in a whip like movement. As each 'link' passes the power down to the link below it, it becomes 'in line'. The fully 'in line' condition of the FORCE is achieved at both arms straight, always ahead of the ball, because low point is below the ground.