When running, you should breathe through your mouth and nose at the same time, closely match your breathing rate with your pace, and take deep breaths when accelerating to increase your breathing time. Specific methods can refer to the following 3 points. 1. When running, the mouth is slightly open, and the nose breathes at the same time, to improve the oxygen supply and relieve the tension of respiratory muscles. 2. Breathing frequency and pace are closely matched, and timely adjustment of breathing when the body is fatigued. When you feel tired, you can slow down the running speed, do deep breathing, increase the area of oxygen and carbon dioxide exchange. After the fatigue is relieved, speed up the breathing and slowly increase the running speed. 3. When you accelerate your running speed, you must adjust your breathing first. Do deep and big breathing, lengthen the time of each breath, facilitate the discharge of more carbon dioxide, increase the amount of inhalation. Finally, we are reminded that if you feel unwell during running, you should seek medical attention immediately. It is recommended to learn the correct running posture under the guidance of professionals.