Posted by: BMill (brumil2@hotmail.com) on Mon Dec 22 12:38:51 2003

Hi Ladies and Gentlemen
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> We are having a very interesting, and I must say, challenging discussion on what classifies a batter as being either a “linear” or “rotational” hitter. The more I analyze the differences we have with each other’s point of view, the more I am convinced it is a matter of how we interpret the two terms.
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> For us to communicate our ideas to one another, and avoid confusion regarding a batter’s mechanics, we must be on the same page as to what the terms we are using actually mean. This is especially true in the linear vs rotational controversy.
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> At first, I thought it would helpful if we pooled our thoughts to see if we could come together and agree on a common definition. This may still be a good idea. However, we must keep in mind, that the basis for definitions of swing mechanics at Batspeed.com is derived from the forces a batter's transfer mechanics applies to the bat, such as, Circular-Hand-Path (CHP), Top-Hand-Torque (THT) and Bottom-Hand-Torque (BHT).
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> Therefore, at this site, linear mechanics is viewed as applying linear (straight or inline) forces to the bat. Pure linear mechanics would generate a straight (A to B) hand-path and the force from each hand would be inline driving the bat linearly knob first at the ball. – I might add, that prior to this site coming online with findings from my study, those linear principles, "hands extending A to B" and "knob to the ball" were taught by the vast majority of coaches.
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> Rotational mechanics applies rotational (CHP and Torque) forces to the bat. Rotational mechanics supply these forces by generating the optimum angular displacement in the hand-path while the hands apply force to the bat from opposing directions (torque). Therefore, I think you can see the problem I would have with a post that refers to Arod as having linear mechanics. But the poster may be right with his definition of linear mechanics.
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> What is your input in defining linear or rotational mechanics?
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> A joyous and Merry Christmas to you all,
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> Jack Mankin

Wouldn't the position of the back elbow at contact from a line through the hips go along way in determining linear vs rotational. The more forward the elbow is from this line wouldn't that indicate more linear? Or maybe from the point where the hands start. I always thought it would be interesting to plot on an axis the path of the hands from start to contact. The start being 0,0 (or center of crosshairs) and the ending point when ball meets bat. The straighter & shorter the line I would think would be more rotational. The time line would also be interesting to compare.