Preparation

General Terminology

• Right arm begins to move down, back, and then up so the racquet is now between the upper and mid back; as if your arm was back to throw a ball
• The left arm goes straight up after racket goes back and the ball is released when the hand reaches about shoulder height
• Knees begin to bend more as the ball is tossed

Shoulder Girdle

• The right shoulder girdle starts in a downward rotation and depression in which pectoralis minor and rhomboid are contracting concentrically
• The right shoulder then goes into an upward rotation in which the serratus anterior and middle and lower trapezious muscles are contracting eccentrically
• The right shoulder eventually ends up adducting in which the lower and middle trapezius and rhomboid are contracting concentrically
• The left shoulder girdle is adducting, rotating upward, and elevating so the upper and middle trapezius, levator scapula, and rhomboid are contracting concentrically  

 Shoulder Joint

• The right shoulder joint is in extension when it begins to externally rotate.  When in extension the right shoulder joint is contracting concentrically at the latissimus dorsi, teres major, lower pectoralis major, and posterior deltoid
• When the right shoulder joint is in external rotation the infraspinatus and teres minor contracting concentrically
• The left shoulder joint is in diagonal abduction with the posterior deltoid, infraspinatus, and teres minor contracting concentrically 

Elbow Joint

• The right elbow joint is flexing with the biceps brachii, brachialis, and brachioradialis contracting concentrically
• The left elbow joint is extending with the triceps brachii and anconeus contracting eccentrically

Radioulnar Joint

• The right radioulnar joint is supinating with the biceps brachii and supinator contracting concentrically
• The left radioulnar joint is supinating with the biceps brachii and supinator contracting concentrically

 Wrist and Hand Joint Movements

• The right hand has flexion of the fingers and thumb with the flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus contracting concentrically
• The right wrist is slightly extending with the extensor carpi ulnaris, extensor carpi radialis brevis, and extensor carpi radialis longus contracting eccentrically
• The left hand has extension of the fingers and thumb with the extensor digitorum, extensor indicis, extensor digiti minimi, extensor pollicis longus, extensor pollicis brevis, and abductor pollicis longus contracting eccentrically
• The left wrist is in neutral position contracting isometrically