Hot weather and excessive sweating in summer can easily lead to imbalance of water and salt metabolism in the body. Health care for middle-aged and elderly people in summer must be supplemented with water. Replenishing water is the foundation of health preservation. It should be noted that the human body must absorb at least 2500 ml of water every day in order to excrete excess wastes and toxins from the body. Moreover, on the dining table in summer, the taste of food should be slightly salty, which can effectively supplement the salt lost due to body sweating. But it should not be too salty, otherwise it will lead to weakened renal function and lead to high blood pressure or heart failure.

Old people should insist on exercising in summer.

The elderly should have at least half an hour or an hour of exercise every day, the main purpose of which is to exercise, so that our bodies can maintain the vitality of all muscles, and finally achieve the purpose of relaxing meridians and promoting blood circulation.

Old people should take a deep breath when they are free in summer.

Deep breathing is pranayama in qigong. Ji Kang's Theory of Health Preservation holds that in the hot summer, "it is more appropriate to calm your heart, which is often like ice and snow, and there is less heat in your heart, so you can't turn heat into heat and reheat it", and points out the summer health preservation concept of "calm your heart and naturally cool it".

The specific way is: take a deep breath through your nose, breathe as long, slowly and deeply as possible, and it is best not to hear your own breathing. At the same time, you can calm yourself down quickly. The combination of deep breathing and closing eyes has a better sustenance effect.