The pushing and also pulling action of the arms and also shoulders refers to the individual activities that each arm and shoulder produce on the bat take care of through their particular hands throughout the swing.

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Since each hand bring away the bat handle from a various direction, the force from the particular arm and also shoulder that it is generating on it will also be different. See figure 4-28.

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Let’s begin by acquisition a look an initial at the player’s left arm throughout the swing. Due to the fact that the left arm and also shoulder are positioned in prior of the left hand (Figure 4-29a) throughout the direction of the swing, or during the direction the the pressure (Figure 4-29b), climate the left arm and shoulder will certainly pull ~ above the bat-handle transparent the totter (Figures 4-29c and also 4-29d).

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And if us take a look currently at the player’s appropriate arm throughout the swing, we watch that his best arm and shoulder space positioned behind the best hand during the direction that the swing, or during the direction of the pressure (Figure 4-30a), and so the ideal arm and also shoulder will press on the bat-handle together seen right here throughout the totter (Figures 4-30b through 4-30d).

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Okay, so now that we recognize for the right-hand batter the the left arm pulls ~ above the bat handle and also the right arm pushes ~ above it, let’s define the muscles connected in both of these arms throughout this component of the swing, beginning with the left eight first.

If you recall throughout the loading phase back on web page 9, number 2-10, the muscles on the earlier side of the left shoulder were stretched. Primarily, these were the Posterior Deltoid, Rhomboids and also middle yarn of the Trapezius muscles. See figure 4-31a. And also with the left arm fully adducted across the former of the body watched in figure 4-31b, 2 of the rotator cuff muscle were also be stretched in the ago of the left shoulder which space the Teres Minor and also Infraspinatus muscles.

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These five muscles can be viewed in an ext detail in figure 4-32.

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Now all 5 of this muscles contract throughout the launching phase and also pull the left arm around bringing the bat-head in contact with the ball. See numbers 4-33a through 4-33d.

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And prior to we go on to the muscle of the best arm, there is one much more important muscle group I want to mention regarding the left arm and that is the elbow or forearm extensors. This muscle team doesn’t traction the arm around during the launching phase favor the previous 5 muscles we discussed but rather, they aid to prolong the left elbow or forearm in ~ contact. See number 4-34.

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Specifically, the elbow extensors space the Triceps and Anconeus muscles, and these can be seen more specifically in number 4-35.

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Okay, now let’s take a look in ~ the player’s appropriate arm. Again, going earlier to the loading phase on web page 9, number 2-11, we discovered that once the appropriate arm to be abducted away from the body it stretched muscles acting around the best shoulder and also chest. See figure 4-36.