Originally Posted by toly
Your statement contradicts with Bruce Elliott measured data http://www.ncbi.nlm.nih.gov/pmc/arti...81/table/tbl2/
Topspin forehand (forward direction)
Approximate contributions to impact racquet velocity (%)
Upper arm - Horizontal flexion 25
Upper arm - Internal rotation 40
IMO, shoulder means: power from legs, core, and etc.
This power produces just 15% of the racket velocity.
The arm and its parts create 85%.
Thus, the arm actions are much much much more important than legs, core, and etc actions!!!
I think what rKelley is saying, which I concur with, is that Bruce Elliot's data does not withstand the scrutiny of practical experience to the contrary. "The proof of the pudding is in the eating," as they say.