[Yoda]

The feet are the movable parts of the swinger being in contact with the stationary ground. It seems that the friction between the shoes and the ground enables the counter force (against the force exerted by the pivot through the feet) from the ground to be transferred through the feet all the way up through the pivot to the shoulders, which drive the arms.

Ben Hogan's golf shoes were custom made for him in England by the Maxwell Shoe Company. They had twelve spikes instead of the normal eleven.

The extra spike was located under the inside ball of each foot.

There was a reason for that.