?? Sofar I've only seen you give your own subjective experience as evidence for that statement. I'm sorry to say I find your fudged statistics (multiple back-and-forth corrections of the data to obtain the desired result) rather unconvincing.
I have taken great pains to ensure that my data is as accurate as possible. Any subsequent corrections of the data are only to fix errors that I discover (such as un-updated rankings). Or for example, I initially had Kafelnikov listed in the wrist band group, but then later discovered that he won both of his majors with bare wrist, so I moved him to the bare wrist group after my initial post of the data.
Please do not carelessly accuse me of "fudging," as this is a serious accusation. My statistical findings can be easily checked by anyone willing to make the effort, since the raw data are already publicly available.
When you hit the ball on the rise chest to shoulder high, as happens very frequently in the modern topspin/power game, the high-to-low part of the forehand is almost non-existent and it's almost entirely in the horizontal plane. You see e.g. Federer do this all the time in a match.
The pendulum model is being applied to the racquet lever, which typically starts at about 7 feet high, so gravity still contributes to the pro forehand, even on chest high balls.
Moreover, you said yourself that your MgR/I-tuning is intended to avoid slight variations in the angle of racketface around a vertical axis through the wrist. However, your MgR/I formula completely ignores the strong horizontal component in the accelleration of the racket (supplied by the player) which necessarily plays a primary role in determining the angle of the racket face at impact. This horizontal component will vary considerably between players depending on their strength, ability and forehand stroke mechanics.
No - I am not completely ignoring the horizontal component. When a pendulum swings downward, potential energy is converted to horizontal velocity. As I have stated many times, the player provides a strong couple to the arm lever, but this couple is not very large until AFTER the racquet has already dropped below the ball due to gravity and gained a lot of momentum due to pendulum physics.
And yes, the stroke mechanics vary from player to player, but not by as much as you might think.
Do you have any objective, empirical evidence for this? When I look at those videos I see that the wrist remains laid back until just before impact with the ball, after which it is relaxed completely in the follow-through. Are you suggesting that the angle of the golf club at impact is not important for the accuracy of the stroke???
A golf club is hitting a stationary object, so high angular velocity at impact is not a problem. For a forehand return, this is not the case. The best returners in the game are the ones who have the lowest angular velocity at impact (check out slo-mo of Ferrer's forehand, who has led the tour in return game % multiple years). Ferrer's angular velocity is almost zero compared to most players. Compare him to Gonzalez, who has a great forehand against slow balls, but he's not as good a returner as Ferrer. Slo-mo analysis of Gonzalez's forehand shows that he has higher angular velocity at impact than Ferrer.
The whole point of this thread is that by tuning your racquet properly, you can just fling your arm toward the ball with a floppy wrist, and your wrist will naturally move in a way that keeps your racquetface at the same angle through the hitting zone. It's a good feeling when you get it tuned right - please show some respect and take the time to try it, you might like it.
. His watch weighs just 20 grams, which is the weight of a small wrist band(i weighed one of mine), so 0.3 difference in MgR/I.
