Perform an analysis of the push-up. The exercise is separated into two movements

Question

Perform an analysis of the push-up. The exercise is separated into two movements, starting in the prone position:  1. Movement to the up position and 2. Return movement to the down phase.

Phase 1:

What type of movement occurs at each upper extremity joint? What muscles are activated at each joint and what type of contraction? Identify the axis of rotation, plane of motion, and joint action.

The joints include: wrist, elbow, shoulder, and shoulder girdle

Phase 2:

What type of movement occurs at each upper extremity joint? What muscles are activated at each joint and what type of contraction? Identify the axis of rotation, plane of motion, and joint action.

The joints include: wrist, elbow, shoulder, and shoulder girdle

Explanation / Answer

Phase 1:

In the pushing phase, motions are occurring at each upper extremity joint includes elbow, shoulder and scapular joints. In the elbow: Extension ,caused due to the triceps brachia muscle contarction. In the shoulder joint: horizontal adduction occurs. This motion occurs when upper arms move horizontally toward the midline of the body. The pectoralis major, deltoids, biceps and coracobrachialis muscles contract during horizontal adduction. At the scapular joint, scapular abduction occurs during the pushing phase. This means that the scapulae move forward as they round the back of the ribcage, a motion also known as protraction. The serratus anterior and pec minor muscles power protraction.

Phase 2:

Once the top of a pushup done , then back down i must. In the lowering phase, the same muscles that work in the pushing phase are active, but this time eccentrically. For example, in the elbow, flexion occurs as one lower his body, but with the triceps eccentrically allowing this motion. In the shoulder joint, horizontal abduction occurs, eccentrically controlled by the pec major, deltoid, biceps and coracobrachialis muscles. At the scapula, scapular adduction, or retraction, occurs, which the serratus anterior and pec minor eccentrically control.

In both the phases the wrist remains in the extension position the extensors of wrist works concentrically while the flexors moves eccentrically

Both the movements occurs at vertical axis and horizontal plane.

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