Hypertension is a risk factor for cardiovascular disease, and most hypertensive patients are not suitable for exercise in the morning, this is because blood pressure reaches its first peak at 8-9 am. Elevated blood pressure in the morning is accompanied by increased heart rate, which can increase myocardial oxygen consumption, and the highest rate of platelet aggregation in normal subjects occurs between 6-9 a.m. Elevated blood pressure in the morning, along with increased blood norepinephrine and blood cortisol concentrations and reduced circulating tissue-type fibrinogen activator activity, can cause coronary artery constriction and plaque rupture, leading to acute myocardial infarction and sudden cardiac death. Although aerobic exercise can help lower blood pressure, but hypertensive patients to avoid early morning cardiovascular events, exercise exercise is best to choose in the afternoon or evening.