Posted by: Jack Mankin (MrBatspeed@aol.com) on Sat Jul 1 15:37:06 2006

>>> If you watch closely you will see that the front hip does not rotate back as far as the front hip rotates back because if this was the absolute truth the body motion would be going backwards due to the tilt of the upper body during the swing. Therefor the bat would be decelerating due to the mass of the lower body puling backwards the the lower massed upper body going forwards. <<<

Hi Dave

If the axis of rotation is stationary (regardless of the angle of rearward tilt) and the body (hips, torso and shoulders) are rotating around that axis, I fail to see how you can say “body motion would be going backwards due to the tilt of the upper body during the swing.” There would be an equal amount of mass rotating forward around the axis as there would be mass rotating rearward.

I will grant you that there are some batters whose back-hip does rotate more forward than the lead-hip rotates rearward. But I also have many clips of Bonds, Sosa and etc. where that is not the case. Their lead-hip rotates rearward at the same rate the back-hip rotates forward (axis, the spin).

Jack Mankin