Tuesday, October 5, 2010

Cycle 1

Push off with power leg, in this case my right leg. Dominant arm brought forward and non-dominant extended backward. Non-dominant leg begins to stride forward as I push off with dominant leg off of toes. I land on my left foot staying on the balls of my feet at all times. All contractions are concentric because it was one fast explosive motion off the starting line.

Shoulder Girdle- Scapulothoracic protraction (abduction) by the pectoralis minor, serratus anterior, and subclavius on the right side.

Scapulothoracic retraction (adduction) by the rhomboids and middle/lower fibers of the trapezius on the left side.

Scapulothoracic Elevation/Upward Rotation by the levator scapulae, serratus anterior, upper and middle trapezius, and rhomboids on the right side.

Scapulothoracic depression/downward rotation by the  pectoralis minor and lower trapezius muscles on the left side.

Shoulder Joint Movements and Muscles- Glenohumeral joint is concentrically contracted through flexion in right arm by anterior deltoid and upper pectoralis major muscles.

Glenohumeral joint is concentrically contracted through extension in the left arm by the latissimus dorsi, teres major, lower pectoralis major, and posterior deltoid.

Elbow- The right radioulnar joint flexes and is concentrically contracted through the elbow flexors which include the biceps brachii, brachialis, and brachioradialis.

The left radioulnar joint extends and is concentrically contracted by the elbow extensors which includes the triceps brachii and anconeus.

Hip- The left hip is flexed and concentrically contracted through the hip flexors which includes the  iliacus, psoas major and minor, rectus femoris, sartorius, pectineus, adductor brevis, adductor longus, and gluteus minimus.

The right hip is extended and concentrically contracts through the hip extensors which includes the biceps femoris, semi-tendinosus, semi-membranosus, and the gluteus maximus.

Knee- The right knee extends and concentrically contracts through the biceps femoris, semi-tendinosus, semi-membranosus, and popliteus.

The left knee flexes and concentrically contracts through the rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis.

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