Posted by: JJA () on Wed Nov 10 12:57:28 2004

Hi, JJA
> I have read your posts in these days with interest.
>
> Thanks to Nick's clip, i could learn that CHP is playing important role in Mr. Mankin's theory.
> Though it will be common also with you and i , there are some differences.
>
> I think it is important with which hand force is applied to the bat in CHP.
>
> You wrote as follows,
>
> >> Consider a modified one arm swing. Grip the bat normally with the bottom hand, but use an open top hand grip, with the bat resting in the palm and between the thumb and forefinger on the bat. This open top hand allows the bat to be supported but not allow significant forces to be transmitted to the bat. Even simpler would be a one arm swing, but this way allows the bat to be supported and thus easier to swing. >>
>
>
> Do you recognize that another modified swing (i.e.,normal top hand and open bottom hand) is also possible?
>

Good question. Sure, it's possible. I know there are actually instructors out there who advocate practicing one arm swings with both top and bottom hand. (For example, Dr. Bragg Stockton and his Skills and Drills series of videos.) My understanding is that some guys can eventually hit the ball nearly as far one handed, with either hand, as they can two handed.

Although I agree that it should be possible to do it with the top hand, I'm a big believer in not doing it that way. I think of the swing as a bottom hand swing, but that's not physics, just my own personal belief system.

The point of my exercise here wasn't to advocate anything, just to point out that top hand and bottom hand torque - which can't be applied in a one handed swing by Jack's definition - isn't nearly as important as the circular hand path (whip effect). The experiments by rql below are clear demonstrations of my assertions, and are totally consistent with Adair, Nyman, etc.

-JJA