Do you know the action analysis knowledge of pull-up? The Wholesale Adjustable pull up price editor will take you to a brief look at it.
1. Forehand pull-ups
When the forehand pull-up is hanging, the arms are straight up, the hands are slightly wider than the shoulders, the palms are forward, the feet are off the ground, and the rectus abdominis, transverse abdominis, internal and external oblique muscles, erector spinae and other skeletal muscles do Isometric contraction to keep the spine in a neutral position. When the trunk moves upward, the biceps brachii and brachialis do distal fixed concentric contraction to flex the elbow; the latissimus dorsi and the posterior deltoid do near fixed concentric contraction to make the upper arm adduction at the shoulder joint. The contraction of the latissimus dorsi provides the main driving force for the pull-up movement, and the middle and lower beams of the trapezius and the rhomboid muscle perform a near-fixed concentric contraction to rotate the scapula downward. During the downward movement of the trunk, the joint movement pattern is closely related to the trunk. The upward movement process is reversed, and all skeletal muscles involved in the movement contract eccentrically to control the rate of the body's descent.
2. Backhand pull-ups
The backhand pull-up is based on the forehand pull-up. The arm is internally rotated to make the palm of the hand backward. Because the short head of the biceps is nearly fixed, the concentric contraction has the function of making the arm internally rotated. Compared with the forehand pull-up The contraction angle of the biceps, the entire biceps can be fully contracted during the backhand pull-up. Therefore, in the process of doing the backhand pull-up, the main driving force of the movement is the latissimus dorsi and the biceps. supply.
The above is the editor of Wholesale Adjustable pull up price: a brief introduction to the action analysis knowledge of pull-ups.

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