When people laugh, the pectoral muscles expand, which strengthens the lung movement, and then promotes the lung breathing function to make the abdominal muscles move;
The contraction and relaxation of abdominal muscles promote the production of gastric juice, improve digestive function, enhance people's appetite and promote body metabolism;
Laughter can increase the movement of blood vessels and muscles, strengthen blood circulation and make people more energetic. And more intense laughter can make the whole body muscles exercise and the body relax.
Modern medicine believes that laughter can be a way to treat neurasthenia, eliminate muscle tension and prevent or relieve pain, so smiling more will really make the body and mind healthier.