Posted by: Jack Mankin (mrbatspeed@aol.com) on Wed Apr 7 18:39:11 2004

>>> Are you saying that if you rotate hard enough that your arms can't hold your hands in? <<<
>
> No.
>
> Jack Mankin

Then what muscles are controlling the arms? Something has to be holding them in when they are wanted in and something letting them out when you want them out??????? <<<

Hi Teacherman

The post below may provide the answer to your question.

Jack Mankin
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Re: outside pitches
Posted by: Jack Mankin (MrBatspeed@aol.com on Sun Jul 29 19:21:25 2001

>>> I just can't seem to hit em. How do get the outside pitch without losing any bat speed and where do you hit it in comparison with the position of your body? <<<

Hi Maximum

Below is a post I made some time ago on the mechanics of hitting the outside pitch. A couple of years back only a few hitters like Big Mac used those mechanics for hitting balls on the outer portion of the plate. Most of the better hitters rotated with the lead arm staying close to the chest and applying bottom-hand-torque to bring the bat to contact. But lately, I have noted a growing number of hitters who start with higher hands (like A-Rod) and pull the top-hand back in a wider arc (11 o'clock) as mentioned below. They are using this mechanic for hitting a wider range of pitch locations. Therefore I see more hitters who have their lead arm casting away from the body much earlier in the swing. --- The video explains this better than I can write.

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"The bat speed of a great hitter requires both torque and the transfer of the body’s rotational energy via the circular-hand-path. Torque supplies about 50% of the bat speed and comes from a combination of top-hand-torque to start the swing and bottom-hand-torque to bring the bat to contact. Most average hitters have a fair chp but lack both THT and BHT.

I think one of the main reasons the torque and chp hitters are leading the performance stats is because they do not need to change their basic swing mechanics due to pitch placement. They are able to use the same mechanics regardless of where the pitcher throws to them and still hit the ball hard. The only adjustment they need to make is a slight change in how they initiate the swing. Once that change is made - their mechanics for the balance of the swing is on autopilot regardless of where the pitch is.

The change in the batter’s initiation that programs the swing is controlled mainly by the direction of pull of the top hand. In other words, the direction of pull of the top hand at initiation sets up trajectories (of the bat, limbs and body) that control the balance of the swing.

As an example - say the pitchers mound is at 6 o’clock and the plate is at 12 o’clock - On an inside pitch the direction of pull of the top hand is in tight, say at 1 o’clock, the back elbow will come almost straight down to the batters side before little rotation of the shoulders can occur. The pulling back of the back-hand keeps the lead-arm across the chest and generates a tight hand-path and thus a low-load resistance to shoulder rotation. The back elbow coming fairly straight down with little body rotation means less top-hand-torque was developed and the batters finishes the swing with a lot lead shoulder pull and bottom-hand-torque.

On a pitch more in the middle 2/3’s of the plate, the pull of the top hand is more straight-away - or at 12 o’clock. With a more straight-away pull, the shoulders rotate a few degrees as the back elbow lowers to the batter’s side allowing a greater amount of top-hand-torque to be applied. This direction of pull also causes the lead arm to cast slightly away from the chest and generates a somewhat wider hand-path. A wider hand-path generates greater bat speed and a higher load resistance to rotation. Less shoulder rotation means less bottom-hand-torque. So on the pitch in the mid-part of the plate, what we wind up with is greater bat speed from a wider hand-path and more balance between bottom and top-hand-torque being applied.

On recognizing an outside pitch, the batters pull of the top hand is more away from center - or at 11 o’clock. This direction of pull causes the back elbow to sweep some distance before full body rotation begins and the elbow lowers. This allows top-hand-torque to be applied over a much greater portion of the swing. This direction of pull also causes the lead arm to cast out farther and develops a wide hand-path and thus a heavy resistant load to rotation. The greater load limits shoulder rotation which equates to less bottom-hand-torque being applied. So, on the outside pitch the swing produces a wide hand-path with a lot of top-hand-torque and little bottom-hand-torque. – With less shoulder rotation on outside pitches, the lead leg may not be fully extended while the back-arm becomes more extended.

Jack Mankin