Resistance breathing method is to use resistance respirator to adjust different levels of inhalation or exhalation resistance, with a normal breathing rate on the resistance respirator for continuous breathing, exercise respiratory muscle strength and endurance. Resistance breathing is generally used in the rehabilitation training of certain respiratory diseases, such as: emphysema, chronic bronchitis, bronchial asthma, etc.. It is forbidden to be used in patients with unstable condition, uncontrolled infection and respiratory failure. Training needs to be gradual and measured to avoid inducing respiratory acidosis and disease exacerbation. Commonly used resistance breathing methods include lip-contraction breathing, bottle breathing, articulation breathing, candle blowing breathing, etc. During training, attention should be paid to avoid excessive breath-holding and excessive slowing down of respiratory rate. In addition, in the resistance breathing training, patients can also carry out appropriate physical training, such as jogging, playing table tennis, tai chi and so on. If the patient is not feeling well during the training process, please go to the hospital in time to avoid delaying the condition.