Release Phase

After the movement occurs the player will release the ball by flexing the wrist of their throwing arm.  This will push the ball towards the net for a successful shot.  


Shoulder Girdle:
Upward rotation and elevation
(Serratus anterior, middle and lower traperzius levator scapulae, rhomboids)


Shoulder Joint:
Maintain shoulder joint flexion by isometrically contracting shoulder flexors
(anterior deltoid, upper pectorallis major)

Elbow Joint:
Maintain elbow extension of the throwing arm by isometrically contracting the elbow extensors.
(triceps, anconeus) 
Maintain elbow flexion of the support arm by isometically contracting the elbow flexors.   
(Biceps Brachii, Brachiallis, Brachioradialis, Pronator Teres)


Hip Joint:
Slight flexion of the hip flexors in an isometric contraction after landing.
(gluteus maximus, semimembranosus, semitendinosus, and biceps femoris)


Knee Joint:
Slight flexion of the quadriceps muscles takes place here in an eccentric contraction.
(Rectus Femoris, Vastus Medialis, Vastus Intermedius, and Vastus Lateralis)