Prep

Open lead foot, rotate trunk and lower body towards pitcher, bend knees, slide hands into proper position on bat

Shoulder girdle downward rotation with muscle fibers of pectoralis minor and rhomboids.

Shoulder joint diagonal adduction by concentrically contracting the pectoralis major, anterior deltoid, and coracobrachialis muscles.

Bilateral elbow joint flexion by concentrically contracting the biceps brachii, brachialis, and brachioradialis muscles.

Externally rotate left hip joint by concentrically contratcing the pectineus, biceps femoris, gluteus maximus, adductor magnus, piriformis, gemellus superior and inferior, obturator internus, externus, and femoris muscles.
Internally rotate right hip joint by concentrically contracting the gracilis, semitendinosus, semimembranosus and gluteus minimus muscles.

Bilateral knee flexion by concentrically contracting the biceps femoris, popliteus, semimembranosus, and semitendinosus muscles.