Nourish the lungs in winter and learn the ＂three methods of breathing＂

　　The Huangdi Neijing says that "man is born with the qi of heaven and earth", and the lung governs qi, which leads to breathing. The breath of the whole body depends on the lung, and the human body depends on the lung to obtain the qi of heaven and earth. Therefore, Chinese medicine attaches great importance to breathing and guiding health preservation. Here are three effective ways to nourish the lungs and breathe in winter:

　　Take a deep breath. Take a deep breath often after getting up in the morning, slow down, and breathe in and out for 6.4 seconds as much as possible. In this way, fresh air can be inhaled, polluted air can be exhaled, the oxygen content in blood can be increased, and aerobic metabolism can be promoted, thus achieving the purpose of nourishing the lungs. Deep breathing is best carried out in places with fresh air such as green spaces or rivers. Usually in the office, the ventilation condition is not good, the personnel density is high, and the shallow breathing method is used at ordinary times, and the ventilation volume is small, so it is easy to feel dizzy, fatigue, memory loss and low work efficiency. You can also carry out breath-holding method, first hold your breath, then stop it, try to stop it until it is unbearable, then breathe it out and go back and forth for 18 times, which is helpful to enhance lung function.

　　Abdominal breathing. When inhaling, swell your stomach, when exhaling, close your stomach, pay attention to breathing through your nose, not your mouth, as long and slow as possible, your brain should be empty and quiet, your whole body should relax and concentrate. Studies have shown that regular abdominal breathing can expand vital capacity, improve cardiopulmonary function, and at the same time have the effect of refreshing the brain.

　　Breathe with your lips contracted. Take a deep breath quickly, shrink your lips into a whistling shape (or fish mouth shape), and then breathe out a little bit. The principle is to turn our usual shallow and fast breathing mode into deep and slow, so that the air stays in the lungs for a longer time and the gas exchange is more sufficient, so that the alveoli can discharge more carbon dioxide.