First, enhance the strength of respiratory muscles.

The novel coronavirus may cause a certain degree of damage to the respiratory muscles, leading to respiratory muscle weakness. Breathing trainers prompt the respiratory muscles of recovered patients to work harder by providing resistance or specific inhalation and exhalation loads. After a period of training, the strength of the patient’s respiratory muscles gradually increases, enabling more effective breathing movements. This helps improve breathing efficiency and reduce the feeling of respiratory fatigue, so that patients no longer feel overly tired due to breathing problems in daily activities.

Second, improve pulmonary ventilation function.

COVID-19 recovered patients often experience a decline in pulmonary ventilation function. Breathing trainers can guide patients to conduct regular deep breathing training. By increasing the depth and amplitude of inhalation and exhalation, it expands vital capacity and improves pulmonary ventilation. This helps improve gas exchange in the lungs, increase oxygen intake and carbon dioxide excretion, thereby relieving symptoms such as dyspnea and improving the overall respiratory function state of patients.

Third, promote sputum excretion.

Some COVID-19 recovered patients may have a problem of sputum accumulation, which will further affect respiratory function. During the use of breathing trainers, by adjusting the breathing rhythm and intensity, a certain airflow vibration can be generated, which helps loosen sputum and promote the movement of sputum to the large airway for easy expectoration by the patient. This has positive significance for preventing pulmonary infection and further deterioration of respiratory function.

Fourth, improve exercise endurance.

Good respiratory function is the basis for physical activities. With the improvement of respiratory function by breathing trainers, the exercise endurance of COVID-19 recovered patients will gradually increase. Patients can perform longer-duration and higher-intensity exercises such as walking and jogging. This not only helps physical recovery but also enhances the patient’s self-confidence and quality of life.

Fifth, reduce psychological stress.

After experiencing COVID-19 infection, patients may be worried and anxious about their breathing condition. Using a breathing trainer and seeing the gradual improvement of respiratory function can reduce the patient’s psychological stress and relieve anxiety. This positive psychological state also has an important promoting effect on the rehabilitation process.