1. The pectoralis muscle and serratus anterior muscle are too weak to support the scapula to maintain stability, which leads to shrugging.

2. The weight is too heavy, and the body tends to use more shoulder and arm strength, leading to involuntary shrug.

3. The coordination of the whole body stability is poor, and the strength of each muscle group is insufficient, which can not support the scapula and arm well, leading to shrugging.

Improving the shrug can strengthen the strength of pectoral muscle and serratus anterior muscle, improve the stability and coordination of the whole body, and pay attention to the correct posture. For example, you can exercise your pectoral muscles and serratus anterior muscles through wall push-ups and diamond push-ups. At the same time, when practicing push-ups, we should pay attention to sinking shoulders and opening shoulder blades, so that the chest can guide strength and reduce the pressure on shoulders.