Preparation

General Terminology

• Both shoulders and hips turn/rotate to your right and the racquet (right arm) moves back and to the right in the motion of a small backwards C so the racquet is now down between your right hip and knee; the top of the racquet is now pointing almost straight behind you
• Your right elbow stays close to your body
• The right leg takes small step to the right so that a little more pressure is on that side of the body
• The left arm is kept out in front of you

Shoulder Girdle

• The right shoulder girdle is adducting with the middle and lower trapezius and rhomboid contracting concentrically
• The left shoulder girdle is abducting with the pectoralis minor, subclavius, and serratus anterior contracting isometrically

Shoulder Joint

• The right shoulder joint externally rotates with the infraspinatus and teres minor contracting eccentrically
• The left shoulder joint internally rotates with the latissimus dorsi, teres major, pectoralis major, and subscapularis contracting isometrically

Elbow Joint

• Initially the right elbow starts out slightly flexing more than it already is with the biceps brachii, brachialis, and brachioradialis contracting concentrically
• During the second half of the preparation the right elbow begins to slightly extend with the triceps brachii and anconeus contract eccentrically
• The left elbow slightly flexes with the biceps brachii, brachialis, and brachoradialis contracting concentrically

Radioulnar Joint

• The right radioulnar joint is initially pronating with the pronator teres and pronator quadratus contracting concentrically
• In the second half of the preparation phase the right radioulnar joint is moving from pronation to supination with the biceps brachii and supinator contracting concentrically
• The left radioulnar joint is pronating with the pronator teres and pronator quadratus contracting isometrically  

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 slightly extends with the extensor carpi ulnaris, extensor carpi radialis brevis, and extensor carpi radialis longus contracting eccentrically
• The left hand has slight flexion of the fingers and thumb with the flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus contracting concentrically 
• The left wrist is in neutral position contracting isometrically