Golf Training
This is an introduction vid to the Sagittal Plane Compression concept (SPC) that explains the optimal biomotorics of a human swinging a golf club in a macroscale. The motion that is totally free of conscious thoughts and uses the hard structure of the human body to build the sequence of events. The automatic golf swing is a dream, true, but the SPC concept can put the golfer much closer to this dream… Learn more at: biokineticgolfswing.blogspot.com
Ben Hogan : Explaining the SPC concept
May 4th, 2010 
Robert Stonehill 
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Yep, torques & overtorques. Merging Newtonian basic physics with anatomy. Great remarks.
Well, those wo are in microscale will do it endlessly; in order to be above it and see such things like you point out now, one needs to go to the macroscale level. IMO.
At 1:22 you can see maximum tension the left arm is aligned with the lower left leg and all muscles are tight as a banjo string from left heel to left hand. From there tension is increased even further by turning hips to target, The rest is automated – lag, sequence, weight shift, secondary axis tilt.
Hogan said that tension developed in the backswing is the key to the downswing making it “almost automatic”. If the downswing can be automated then what is the point of endlessly dissecting body positions ?
Sometimes huge differences in microscale are still minor differences in macroscale. I do not deal with microscale details. The idea of subduing the downswing to rotational motion entirely and only is mechanically perfect and I believe an average human can perform it. Of course, there must be a linear motion because we’re bipedals. The trick is not to melt these motions or melt them as less as possible (Hogan).
As per timing issues – we should try always to find ways to eliminate them totally.
I would guess that the point of a theoretical ideal would be to provide a practical application. In that sense it would be advisable to come up with examples that exhibit the specific details of the theory. the ” few minor differences” that you refer to are not minor at all, but instead are essential to anyone trying to make a real golf swing. The timing, amount, direction and duration of lower body movement during the swing, especially in transition and the downswing, is critical.
Good points. However, the SPC concept is not just an attempt to depict Mr.Hogan’s swing motion. The primary goal was to learn how biokinetics can influence the degree of possibilities to automate the very motion. Hogan was choosen as a model because his swing contains the most common denominators with my studies. Therefore, there are a few minor differences between the theoretical ideal and Mr.Hogan.
Your 2nd expansion phase (pure rotation) is too early. From the face-on view any Hogan swing demonstrates that the furthest left point of the hips is not reached until the left arm is at least 45 degrees below parallel to the ground. In other words, the rotation is still combined with the lateral movement further along than you suggest. I would argue as well the rear (right) side is never passive, but is constantly thrusting off the ground and upward to the finish. Note driving right foot