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Old 07-06-2011, 06:33 AM   #6
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Join Date: May 2009
Location: Centurion, South-Africa
Posts: 90

Originally Posted by kaiser View Post
Trav, there is something about yopur MgR/I formula I've been wondering about for some time now. What pendulum action around the wrist are you referring to? When you look at slomo movies of e.g. the Federer forehand, you can clearly see that most of the accelleration towards the ball occurs in the horizontal plane (for an example, see So how does g, the accelleration due to gravity, which only occurs in the vertical plane, affect the pendulum around the wrist? Wouldn't the horizontal accelleration component of the racket arm, as generated by the player, be more important here?

Also, when you look at the pendulum action of the wrist, the wrist remains usually completely laid back up untill the point of contact with the ball. That is, the pendulum action around the wrist joint typically occurs after the ball is hit, during follow-through. Then how can this pendulum motion so crucially affect the stroke and, indeed, a player's ranking if it takes place after ball contact?

I'm looking forward to your explantion.

Good questions, although he did state that its the natural pendulum action, hence why g is used.

My question is: The sample for the data seems pretty small. Only data from 2005 onward was used (Or was it just for 2005?). Since then the top five players has pretty much consisted of the same small group of people. So there is a big chance that the dip in the graph for the top five is simple coincidence.
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