Inclusion Criteria:

1. Between the ages of 18 and 65 years;

2. A history of new coronavirus infection;

3. Patients with a clinical diagnosis of COVID-19-related myocardial injury;

4. In the late stages of recovery from COVID-19-related myocardial injury, at least 3
months after diagnosis;

5. Negative cardiopulmonary exercise test;

6. After completing respiratory rehabilitation at our hospital in the previous period;

7. Normal blood biomarker tests and essentially normal 2D-STE, normal left ventricular
systolic function, no spontaneous or inducible arrhythmias on electrocardiographic
monitoring, and the patient's clinical status is stable, with most of the symptoms
in significant remission, and the daily still activities are intolerant or do not
reach the pre-disease exercise level;

8. Classification of nyha heart function of class I or II;

9. Voluntarily sign the informed consent form;

10. Not participating in other clinical trials.

Exclusion Criteria:

1. a previous history of coronary atherosclerotic heart disease and heart failure;

2. a combination of severe arrhythmia or cardiogenic shock;

3. a combination of severe hypertension, hypertrophic cardiomyopathy, valvular disease
of moderate or greater severity, acute myocarditis or pericarditis;

4. a combination of any disease that severely affects limb movement, such as
musculoskeletal disorders or severe hepatic or renal insufficiency

5. a combination of progressive malignant tumors, infectious diseases, bleeding
disorders, autoimmune diseases, etc;

6. those who have serious mental illness and are unable to cooperate

7. those with incomplete clinical data;

8. those who have dropped out or terminated the trial by themselves.