Posted by: Shawn (mariner0324@yahoo.com) on Mon Feb 27 14:07:54 2006

> > >>> Hi Jack,
> >
> > The problem I see with THT is wrist may uncock to soon. I'm still looking at this and how it affects the swing. I have game footage and HR derby swings with shots from the rear and side view of the same swings.
> >
> > Right now it would appear that the top hand 'follows' the bottom hand. I'm looking at how much the bat is accelerated length wise (down the barrel) in the swing. To attain the lag position the top hand cannot uncock to early.
> >
> > I'll get back to you on what I see happening. <<<
> >
> > Hi Shawn
> >
> > You state, “The problem I see with THT is wrist may uncock to soon.” – While THT is being applied there should be no cocking or un-cocking of the top-wrist. As the forearm is pulling rearward, and the elbow lowers, the wrist remains straight. It is the rotation of the forearm (internal if you wish) and thus the wrist (not wrist un-cocking) that allows the bat to rotate from its launch position to the lag position.
> >
> > The pulling back of the forearm as the elbow lowers, results in the forearm becoming almost vertical and it is rotating (internally) to allow the bat to rotate – but the wrist remains straight. The cocking, or adduction, of the top-wrist occurs as the forearm further rotates and lowers toward horizontal – well after applying THT. The wrist un-cocks as the bat approaches contact.
> >
> > Shawn, when THT is properly applied, the forearm becomes more vertical allowing the top-wrist to rotate in the plane of the swing. Serious wrist bind occurs when a batter accelerates the bat to vertically down through the plane and forces the wrist to bend (or cock) as it attempts to rotate.
> >
> > Jack Mankin
>
> Hi Jack,
>
> Lets explore the top hand not turning. You say the wrist should remain straight while applying THT. I would bet good money that 9 of 10 people would turn the wrist while applying THT. So lets explore this further.
>
> I'm still looking at clips. The top hand seems to remain cocked through a good portion of the swing. It does turn to some degree, but the top hand remains following the bottom hand so it doesn't release to soon. I'm sure we can find some swings were the top hand just turns, there's a clip on one of Yeagers DVD where this is happening. I'm sure that the closer you hit to the power L position the more the top hand just turns.
>
> I think it's best to think of the oar lock and bottom hand torque. I think the wrist would remain straighter with BHT. In fact it might just be that what we see as THT is nothing more then BHT being applied and the wrist top hand wrist rotating as the elbow goes into it's vertical position.
>
> I'm still looking at some swings. I would like to discuss the THT.

HI Jack,

Still waiting to discuss the THT issue.

It appears that the early arcing of the bat is feed by two forces. One force is working down the length of the bat and the other to turn it. The rapid rotation of the bat doesn't take place until the lag position.

It appears the bat works on a curve/linear path through the first portion of the swing. The real rotation of the bat takes placce from the lag position and out into full extension. The bat hasn't completed the swing at the power L position, the bat/swing is completed at full extension.

The bats real rotational part happens from the lag position to full extension. This is when the hook affect is being applied. Before going into the real rotational part the bat follows a curve/linear path. The arcing, which is very small, is limited by this curve/linear path. It takes a great deal longer to move through the first part of the swing, as compared to the last part or when the real rotational part takes place.

So one question is how does THT enhance the curve/linear path the bat follows. Remember the bat doesn't arc a great deal through the first portion of the swing, it is the last portion from lag to full extension where the bat undergoes a great rotation. The is also considered a short swing, no early arcing, casting, looping.