Exclusion criteria
atrioventricular block, mental illness, fever, sinus tachycardia, myocarditis, atrial or ventricular arrhythmia, dementia, Unstable angina pectoris, pericarditis, hyperkalemia, thromboembolism, depression, hypovolemia, metabolic abnormalities, hypokalemia
ATRIOVENTRICULAR BLOCK, SYSTEMIC DISEASE, UNSTABLE ANGINA PECTORIS, SINUS TACHYCARDIA, MYOCARDITIS, PERICARDITIS, THROMBOEMBOLISM, THROMBOPHLEBITIS, EVENTS, HEART FAILURE, SEVERE AORTIC VALVE STENOSIS, ACUTE THYROIDITIS
(1) Unstable angina pectoris; (2) patients with systolic blood pressure > 160 mmHg or diastolic blood pressure > 100 mmHg at rest, or blood pressure drops >20 mmHg after standing upright, with symptoms; (3) severe aortic valve stenosis; (4) acute systemic disease or fever; (5) uncontrolled severe atrial or ventricular arrhythmia, uncontrolled obvious sinus tachycardia (>120/min); (6) uncontrolled heart failure, third-degree atrioventricular block without a pacemaker; (7) active pericarditis or myocarditis, thrombophlebitis, recent thromboembolism events, ST segment depression, or elevation (> 2 mm) at rest; (8) severe motor system abnormalities and other metabolic abnormalities, such as acute thyroiditis, hypokalemia, hyperkalemia, or hypovolemia, which can affect exercise capacity; (9) pregnancy; and (10) patients with severe mental illness or dementia.