Bat Speed -- Baseball Hitting Forum

Posted by: BHL (Knight1285@aol.com) on Sat Dec 17 15:41:56 2005

> >>> jack,look how far the back foot moves and how much their head moves too.What causes the back foot to move up so much,is that a signal that at some point you are no longer spinning on that axis?Or does that motion happen after all the rotation is completed? hers the clip
>
> http://www.rightviewpro.com/mantelvsichiro.php <<<
>
> Hi Mark
>
> In the clip you provided, you ask, “What causes the back foot to move up so much” – I think we can agree that the rotation of the back-hip around toward the pitcher is mainly responsible for dragging the back-foot forward during the swing. Since the back-foot is being drug forward, it is also apparent that the drive (or extension) of the back-leg is not powering hip rotation.
>
> Some batting authorities have concluded that momentum developed during the stride is what causes the back-hip to rotate. However, the transfer of momentum must follow physical law rather than the wishes of a batting theory. As the clips you provide show, at foot plant, the back-hip is in-line with the lead-hip. This means that when the lead-leg blocks hip-slide, there is no rotation induced because there is just as much tendency for linear momentum to rotate the back-hip clock-wise as counter-clock-wise at foot-plant.
>
> Just because a right-handed batter wishes to rotate his hips counter-clock-wise will not alter the laws governing momentum. The tendency for the hips to rotate one way or the other are balanced when in-line and momentum is directed straight away – Like an arrow striking a tree, it does not snap off because its linear momentum is directed in-line down its shaft and into the tree.
>
> I have stated before that muscle contractions in the lower-back and hips along with the torque supplied from the extension of the lead-leg is mainly what drives hip rotation.
>
> Jack Mankin

Hi Jack:

Drug is ungrammatical. The cooperate way is dragged. Whereas the former is clearly a verb of your own feigning, the latter is found in the OED. (The only dictionary drug might be found in is in one that pertains to regional dialects).

Enjoy your holidays,
BHL

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> > >>> jack,look how far the back foot moves and how much their head moves too.What causes the back foot to move up so much,is that a signal that at some point you are no longer spinning on that axis?Or does that motion happen after all the rotation is completed? hers the clip 
> > 
> > http://www.rightviewpro.com/mantelvsichiro.php <<<
> > 
> > Hi Mark
> > 
> > In the clip you provided, you ask, “What causes the back foot to move up so much” – I think we can agree that the rotation of the back-hip around toward the pitcher is mainly responsible for dragging the back-foot forward during the swing. Since the back-foot is being drug forward, it is also apparent that the drive (or extension) of the back-leg is not powering hip rotation. 
> > 
> > Some batting authorities have concluded that momentum developed during the stride is what causes the back-hip to rotate. However, the transfer of momentum must follow physical law rather than the wishes of a batting theory. As the clips you provide show, at foot plant, the back-hip is in-line with the lead-hip. This means that when the lead-leg blocks hip-slide, there is no rotation induced because there is just as much tendency for linear momentum to rotate the back-hip clock-wise as counter-clock-wise at foot-plant. 
> > 
> > Just because a right-handed batter wishes to rotate his hips counter-clock-wise will not alter the laws governing momentum. The tendency for the hips to rotate one way or the other are balanced when in-line and momentum is directed straight away – Like an arrow striking a tree, it does not snap off because its linear momentum is directed in-line down its shaft and into the tree.
> > 
> > I have stated before that muscle contractions in the lower-back and hips along with the torque supplied from the extension of the lead-leg is mainly what drives hip rotation.  
> > 
> > Jack Mankin
> 
> Hi Jack:
> 
> Drug is ungrammatical.  The cooperate way is dragged.  Whereas the former is clearly a verb of your own feigning, the latter is found in the OED.  (The only dictionary drug might be found in is in one that pertains to regional dialects).
> 
> Enjoy your holidays,
> BHL

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