Clubbing/Punching efficiency & bipedal stance

“Selection for improved throwing and clubbing produced an innovative, instinctive, whole-body motion performed from an upright stance that begins with a thrust of the legs. Improved dynamic upright balance on more powerful legs and resilient feet in the service of throwing and clubbing would have made upright locomotion more efficient, leading to its increasing use and eventually culminating in habitual bipedalism.”

From *Evolution of the human hand: the role of throwing and clubbing*, Richard W. Young, Professor of Anatomy UCLA. doi: 10.1046/j.1469-7580.2003.00144.x