KINE 3340 : Growth Notes 2.docx

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Preparatory phase: all movements directed away from intended line of projection. Follow through: movements following release of object. Bos changes from stationary to shifting position. Step 2: ball beside head, exaggerated elbow flexion. Option 3: vertical lift of throwing arm. Option 4: arm moves back; by grade 2 boys use this. 1: posterior-anterior direction, feet don"t move, little trunk rotation. 2: more body rotation, may step forward, arms brought forward. 3: ipsilateral arm-leg action, arm goes behind head and as it is thrown the same side leg steps forward. 4: contralateral movement, little rotation of hips and spine, stride forward for a side bos. Ball size increase in ball size causes a performer to use a less mature pattern; transition from one handed grasping to two handed. Angle of ball release: mature angle of release is 15 degrees. Greatest gender difference for all fs is seen in throwing.

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