Prepatory phase for "snapping"

Prepatory phase: squat down with straight back and leaning forward, with one hand on the ball to grip it (other hand may rest on thigh).

Shoulder Joint: flexion, with anterior deltoid and upper pectoralis major muscles, Concentric.

Shoulder Girdle: Elevation/upward rotation, with levator scapulae, serratus anterior, upper and middle trapezius, and rhomboid muscles, Concentric.

Elbow:

     Right: extended, with the tricep brachi muscles, eccentric

     Left:flexed, with brachialis muscle, concentric

Radioulnar joints: 

     Right: pronation, with pronator teres, concentric

     Left: pronation, with pronator teres, concentric

Wrist and Hand:
     Right:  Flexion/Abduction of wrist, with flexor carpi radialis, concentric 
                Flexion of fingers, with flexor pollicis longus and flexor digitorum superificialis, concentric
     Left:   wrist and fingers are neutral