Right-angle shoulder may cause breathing difficulties. Right-angle shoulder is an internet buzzword and is not a normal phenomenon. In medical terms this condition is known as subscapularis kyphosis syndrome, which is caused by some improper exercise that changes the position of the shoulder joint or by muscle or ligament strain, and is prone to muscle soreness, pain and other symptoms. Right-angle shoulder state as the scapula is not in the normal physiological position can lead to changes in the length of the related muscles and the position of the shoulder joint. This may lead to a decrease in the stability of the shoulder joint, which may lead to injury in daily life; a change in biomechanical balance, resulting in muscle compensation, causing shoulder and neck strain, trapezius muscle coarsening, etc., and shoulder and neck pain; it may also compress the thorax, resulting in a shorter neck, which may affect breathing, causing breathing difficulties and a feeling of chest tightness and shortness of breath. Continuous compression of the thorax may also lead to localized pulmonary atelectasis and aggravate breathing difficulties, resulting in lower oxygen content in the blood and symptoms such as weakness and dizziness. Maintaining this state for a long time may also compress the peripheral nerves, causing muscle weakness and difficulty in movement. Therefore, it is not recommended to pursue the right-angle shoulder for aesthetic purposes. If you need to exercise, you can do the correct, effective and beneficial exercise under the guidance of a professional, taking into account your own physical condition.