Arm muscle strain

Arm muscle strain is a type of muscle strain, which is caused by sharp contraction or excessive stretching of muscles during exercise. A muscle strain is an injury caused by a sharp contraction or excessive stretching of a muscle during exercise. This can easily happen with long chins, pull-ups, and sit-ups. After a muscle strain, the area of ​​the strain is severely painful. You can feel the rope-shaped hard mass formed by the muscles with your hands. The pain is obvious, the local swelling or subcutaneous bleeding is obvious, and the activity is obviously restricted.