To explore the clinical value of pulmonary rehabilitation training in convalescence of patients with severe or critical Corona Virus Disease 2019(COVID-19).

From February 3, 2020 to February 29, 2020, the clinical data of 11 COVID-19 patients in convalescence at Dabie Mountain Regional Medical Center in Huanggang were retrospectively analyzed. Exercise tolerance and lung function before training and 2 weeks after training were compared.

Before pulmonary rehabilitation training, the lung function included forced expiratory volume 1 (FEV₁), forced vital capacity (FVC), FEV₁/FVC, FEV₁%pred were (1.73±0.46)L/min, (2.34±0.64)L/min, (74.82±11.91)%, (60.17±7.91)%, respectively. Brog score was (2.81±0.40) points and 6 min walking distance (6MWD) was (348.45±83.29)m. After 2 weeks, the Borg score and 6MWD were (1.50±0.74)points and (425.00±68.29)m, they were significantly better than those before training (t=-6.80, 7.94, all P<0.01). FEV₁ [(1.92±0.43)L/min] and FVC [(2.51±0.67)L/min] also were improved significantly (t=2.32, 6.95, all P<0.05). The levels of FEV₁%pred, FEV₁/FVC [(67.32±6.63)%, (77.82±8.39)%] showed no marked difference (t=2.15, 0.96, all P>0.05).

The recovery period patients exist airway limitation in patients with severe or critical COVID-19, pulmonary rehabilitation therapy can effectively reduce dyspnea symptoms, enhance activity endurance, and improve lung function.