Bat Speed -- Baseball Hitting Forum

Posted by: Jack Mankin (MrBatspeed@aol.com) on Sun Oct 30 13:48:54 2005

>>> I do not see where you have gotten Jack and I are being any less then fair to each other.

I have a problem with Jack saying that a weight shift doesn't contribute to power.

The clip he provided is a poor example to use or try to rebute weight shift. I have clip of Vlad that show his weight shift rather well.

The stride is part of the force production and isn't a useless timing device. Anyone who has remotely studied hitting knows that the weight shift back is the begining of force production, beginning of the swing process. During the "stride" there is both a weight shift back (loading) and a weight shift forward (positive move). The unloading starts as the stride ends, and when the swing begins (bat moves forward). Just because the bat doesn't begin forward until toe touch, doesn't mean that is the start of force production. This is rather basic biomechanics.

If there was no weight shift into the swing, the weight would remain on the back foot. And everyone know this is not the case in a high level swing.

I'm sorry but you simply do not understand the agruement or the swing.

If Jack doesn't believe that weight shift contibutes to power is one thing, to deny it's existence is completely different. Jack does not deny it's existence, he merely doesn't understand how it's used in the swing. He is so wrapped up in an unmoveable axis that he doesn't see how the weight shift is used in the swing. <<<

Hi Shawn

I have never said weight shift (body moving forward) does not exist. I said its existence occurs prior to rotation and the swing. You stated that a clip showing a close-up of Guerrero ( http://www.youthbaseballcoaching.com/mpg/Guerrero01.mpeg ) from the hips-up is a poor example to discuss weight shift. It would then appear your version of weight shift depends more on what occurs below the hips. If the upper body is equally involved, please point it out in the Guerrero clip.

It would help if you clarified your definition of “weight shift.” Must the upper body move for there to be a weight shift? Or, is it more dependent on which leg is supporting the weight at different points of the swing?

Jack Mankin

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> >>> I do not see where you have gotten Jack and I are being any less then fair to each other.
> 
> I have a problem with Jack saying that a weight shift doesn't contribute to power.
> 
> The clip he provided is a poor example to use or try to rebute weight shift. I have clip of Vlad that show his weight shift rather well.
> 
> The stride is part of the force production and isn't a useless timing device. Anyone who has remotely studied hitting knows that the weight shift back is the begining of force production, beginning of the swing process. During the "stride" there is both a weight shift back (loading) and a weight shift forward (positive move). The unloading starts as the stride ends, and when the swing begins (bat moves forward). Just because the bat doesn't begin forward until toe touch, doesn't mean that is the start of force production. This is rather basic biomechanics.
> 
> If there was no weight shift into the swing, the weight would remain on the back foot. And everyone know this is not the case in a high level swing.
> 
> I'm sorry but you simply do not understand the agruement or the swing.
> 
> If Jack doesn't believe that weight shift contibutes to power is one thing, to deny it's existence is completely different. Jack does not deny it's existence, he merely doesn't understand how it's used in the swing. He is so wrapped up in an unmoveable axis that he doesn't see how the weight shift is used in the swing. <<<
> 
> Hi Shawn
> 
> I have never said weight shift (body moving forward) does not exist. I said its existence occurs prior to rotation and the swing. You stated that a clip showing a close-up of Guerrero ( http://www.youthbaseballcoaching.com/mpg/Guerrero01.mpeg ) from the hips-up is a poor example to discuss weight shift. It would then appear your version of weight shift depends more on what occurs below the hips. If the upper body is equally involved, please point it out in the Guerrero clip.
> 
> It would help if you clarified your definition of “weight shift.” Must the upper body move for there to be a weight shift? Or, is it more dependent on which leg is supporting the weight at different points of the swing?
> 
> Jack Mankin

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