Notice that the word 'shift' was applied to both COM (center-of-mass) and COP (center-of-pressure).
Also notice the article used the word 'transfer' once, and did so interchangeably with their use of the word 'shift'.
Decent article that may open up the discussion. Decent conclusion also ... "not as much a transfer of weight as it is an exertion of force".
Still comes down to the 'how' that is important.
Edited to add excerpt from the article.
While it’s common for athletes and coaches of throwing or striking sports to emphasize the importance of force in the push off leg, force in the plant (or lead leg) is actually more closely tied to speed.
Last edited by FiveFrameSwing; 11-12-2017 at 05:07 PM. Reason: typo
The article says "unweighted" too!
"At footstrike he shifts all of his bodyweight into his front leg."
I still like to think against, considering the weight or center of mass is still back.
@Shawn , "Cano is applying tremendous vertical and horizontal force through his lead leg to help generate rotational speed, but his weight (represented by his center of mass) remains back. Cano isnít shifting his center of mass significantly, but rather creating GRF with his lead foot, therefore shifting his center of pressure"
I would say this confirms your observation that you don't see much shifting.
Maybe the distinction between center of pressure and center of mass is a better focus than trying to make a distinction between shift and transfer when they're really synonymous? I don't mean that in any negative way. It's enlightening to me as well.
Eric F (11-13-2017)