Whether a person with myocardial disease can run or not depends on the extent of myocardial damage and clinical symptoms. If the myocardial damage is severe and there are significant clinical symptoms of heart failure and arrhythmia, this group should not run and needs bed rest. If strenuous activity would worsen heart failure, the myocardial damage is mild, with no typical clinical symptoms, and does not affect daily activities, this group can engage in appropriate exercises like walking or running, but the duration should not be too long, about 20 to 30 minutes each time.