Tuesday, October 5, 2010

Preparation


The player then tosses up ball (with left hand) out in front and simultaneously brings back racquet (in right hand) behind the head. Also at the same time the right foot is stepped in closer to the left foot and knees are fully extended to make the player stand fully erect.

Shoulder Girdle:
Right shoulder girldle is adducted with concentric contraction of middle and lower fibers of rhomboids and trapezius. This is then followed by upward rotation with concentric contraction of middle and lower fibers of trapezius and serratus anterior.

Left shoulder girdle undergoes upward rotation with concentric contraction of middle and lower fibers of trapezius and serratus anterior.

Shoulder Joint:
Right shoulder joint is diagonally abducted with concentric contraction of posterior fibers of deltoid, infraspinatus, and teres minor.

Left shoulder joint is abducted with concentric contraction of supraspinatus, deltoid, and upper fibers of pectoralis major.

Elbow Joint:
Right elbow joint is flexed with concentric contraction of biceps brachii, brachialis, and brachioradialis.

Left elbow joint remains in extension with isometric contraction of triceps brachii and aconeus.

Hip Joint:
Hips are adducted through concentric contraction of pectineus, adductor brevis, adductor longus, adductor magnus, and gracilis.

Knee Joint:
Right and left knees are fully extended with concentric contraction of rectus fermoris, vastus intermedius, vastus lateralis, and vastus medialis.

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