shēn hū xī

Deep breathing is also known as strengthening breathing, in which both inhalation and exhalation are active. During deep inhalation, in addition to strengthening the contraction of the intercostal muscles and diaphragm, other muscles that support inhalation, such as the sternocleidomastoid and trapezius muscles, also participate in the contraction, so that the sternum and the first ribs are lifted upward and outward to expand the upper part of the thorax. When exhaling y, the intercostal muscles and the abdominal wall muscles participate in the contraction, so that the volume of the thorax is further reduced, and the exhalation becomes an active action. When strong and fast deep breathing, there are many other muscles in the trunk to participate in the activity, and the physical exertion is also greater. In the morning in the fresh air for slow and rhythmic deep breathing exercise, exhale the accumulated CO2, inhalation of more O2, long-term adherence to good health.