Follow-up investigation of COVID-19 lung function and rehabilitation training in discharged patients

INTERVENTION: control group:Follow-up and lifestyle guidance;experimental group:rehabilitation training; CONDITION: Novel Coronavirus Pneumonia (COVID-19) PRIMARY OUTCOME: cardio-pulmonary function;ADL;Lower limb function;balanced capacity; INCLUSION CRITERIA: The inclusion criteria of rehabilitation training intervention subjects were: 1. COVID-19 patients; 2. Discharged from hospital; 3. Respiratory dysfunction or motor dysfunction or self-care ability disorder according to relevant functional assessment; 4. Aged 18-70 years; 5. Willing to accept rehabilitation training of this program