The aim of the study was to intervene in the Aerobic exercise time of patients with STEMI and to explore the optimal exercise time for STEMI patients
Between 18 and 75-years-old;
Typical symptoms of acute myocardial infarction within 24 hours, with ST segment elevation of ≥1mm in two consecutive leads on electrocardiogram
After receiving complete revascularization treatment
Cardiac function grading I to II without any other serious complications
Patients with unstable angina
severe symptomatic congestive heart failure detectable myocardial ischemia
valvular disease requiring surgery
severe ventricular arrhythmias
Parallel
Morning aerobic exercise
Other interventionPatients were randomly assigned to morning aerobic exercise training for a 12-week outpatient training program that included a combination of warm-up, aerobic, and relaxation exercises three times a week. Each class consists of 10 minutes of warm-up training, 40 minutes of aerobic training and 10 minutes of relaxation training. The intensity of aerobic exercise training will be personalized. According to the guidance of relevant guidelines, the exercise intensity of patients will be determined according to the results of their first cardiopulmonary exercise experiment, and the exercise load will be gradually increased according to the exercise program until the predetermined goal is reached. Patient fatigue levels will be monitored throughout the exercise using the borg scale.
Evening aerobic exercise
Other interventionPatients were randomly assigned to evening aerobic exercise training for a 12-week outpatient training program that included a combination of warm-up, aerobic, and relaxation exercises three times a week. Each class consists of 10 minutes of warm-up training, 40 minutes of aerobic training and 10 minutes of relaxation training. The intensity of aerobic exercise training will be personalized. According to the guidance of relevant guidelines, the exercise intensity of patients will be determined according to the results of their first cardiopulmonary exercise experiment, and the exercise load will be gradually increased according to the exercise program until the predetermined goal is reached. Patient fatigue levels will be monitored throughout the exercise using the borg scale.
left ventricle ejection fraction
Use cardiac ultrasound system to measure left ventricle ejection fraction
Oxygen consumption
Patients will be submitted to cardiopulmonary exercise testing on a bicycle, using the modified Bruce protocol. Expired gases will be continuously collected throughout exercise and analyzed for ventilatory volume (VE) and for oxygen (O2) and carbon dioxide (CO2) content, using dedicated analyzers. The investigators will assess exercise capacity mainly by measuring anaerobic threshold oxygen consumption and peak oxygen consumption.
Endothelial Function
Use high-resolution Doppler duplex ultrasound e equipment to analysis Baseline arterial diameter (mm), peak arterial diameter (mm).
Skeletal muscle and fat mass
Determined by multifrequency BIA using an InBody 770 analyzer (InBody Co., Ltd), that estimate skeletal muscle mass, Body fat mass, distribution of lean body mass and ratio of segmental lean mass.
Cardiac structure
Use cardiac ultrasound system to measure left ventricular end-diastolic/end-systolic internal diameter, and left ventricular anterior wall thickness.
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