"Round shoulders". It is a kind of muscle imbalance, which is common in sedentary people and fitness training.
A person who overtraining his chest muscles. Too much exercise of the pectoral muscles will make the over-strong pectoral muscles pull the shoulders forward.
It has become a "round shoulder" and there are two ways to eliminate it. One is to relax the chest muscles and shoulder muscles (upper trapezius muscles), and the other is to exercise.
The lower bundle of trapezius muscle and rhomboid muscle is rowing in a sitting position. In fact, just relaxing and training muscles is not enough.
It is more important to maintain a correct sitting posture in work and life-straight waist, slightly chest out, heavy shoulders and slightly adduction.
Ba, when you are sedentary, you should get up and exercise every 1 hour to relax your tight muscles.