很多人习惯长跑时张嘴呼吸,以便摄入更多的氧气。这种呼吸方法并不科学,特别是在天气转凉后,冷空气会刺激咽喉和气管,可能引发哮喘、咽炎。长跑能促进人体各个器官的循环,特别是呼吸系统,不过跑步时应用鼻腔或口鼻混合式的呼吸。我们的鼻腔表面有一层黏膜,上面有丰富的毛细血管,血液流经黏膜散发的热量,就能温暖吸入的冷空气。黏膜还能分泌黏液,使鼻腔保持湿润,粘住吸入的灰尘和细菌,起到清洁的 Many people are accustomed to mouth breathing while long-distance running, in order to ingest more oxygen. This method of breathing is not scientific, especially in the cold weather, the cold air will stimulate the throat and trachea, may cause asthma, pharyngitis. Long-distance running can promote the circulation of various organs of the human body, especially the respiratory system, however, when running, nasal passages or mixed oral and nasal breathing should be used. Our nasal surface has a layer of mucosa, rich in capillaries above it. The blood flows through the mucous membrane to dissipate the heat and warm the inhaled cold air. Mucosal secretion of mucus can also make the nasal cavity to keep moist, stick inhaled dust and bacteria, play a clean