Yes, sir. There's a summing principle in that "something" is being done to get speed "out to the club." However, the something that is being proffered in this particular sample is that there's a particular sequencing of body parts. Kinematic sequence theory operates on the level of proximal/distal sequencing. It's a theory. In reality it's not that simple. Science has its shortcomings. It's not perfect. We'll keep learning. That's life.
Three-dimensional kinematic analysis of the golf swing using instantaneous screw axis theory, Part 2: golf swing kinematic sequence - SpringerOh really?
2 of the 5Results indicate that the kinematic sequence of 2 of the 5 subjects analyzed supports the summation of speeds principle, where the sequence in which the maximum angular velocity about the pelvis, shoulders and left arm occurred, for one subject, at 68.2 ± 3.2, 72.8 ± 1.7 and 100 ± 0.0% of the downswing.
So there are guys like [...] Jim McLean, who's shoulders don't operate according to the theoretical framework [...]
I disagree with this entire post.I can't find the DJ video. As I remember it the torso numbers fluctuated all over the place on the downswing.
Because the shoulder sockets can adduct and abduct independently of each other, this can be an issue if the shoulders are used for the torso measurements. It's a different situation than the hip sockets, which cannot move independent of one another.
The creator of the MATT system also said he thought it the torso numbers were probably an anomaly, IIRC.
IMO, this is not enough to debunk proximal to distal sequencing in elite swings.
The shoulder issue we first noted when MATT sequences were posted...
It remains the elephant in the room...