1, the definition of health: physical, mental, social adaptability are in a good state to be considered healthy. Health for the whole society is the productivity! For each person is dignity, is happiness! Physical health is the capital of our happy life. Perhaps those who have health do not feel this deeply, but those who have been or are suffering from illness must have bitter feelings: when a person lying in a hospital bed, not only to bear the pain of the body, and can not dominate their own, no dignity, but also drag their loved ones …… No one wants to experience this feeling. Scientists have confirmed that the theoretical life expectancy of human beings should be 160-170 years. But in reality, there are many factors that affect our health and shorten our life expectancy. 2009, the World Health Organization announced that 70 years old is the limit for the elderly. Because of the different national conditions our country is 65 years old, which also shows that human life expectancy is increasing. We not only want to live a long life, but also healthy, to have quality. 2, the first killer of human beings – cardiovascular disease: With the development of material civilization, the ability of human beings to resist various infectious diseases has been improving, and cardiovascular disease has jumped to be the first killer of human beings. The culprit of cardiovascular disease is atherosclerosis. With the onset of winter, the temperature drops and cardiovascular and cerebrovascular diseases enter a high incidence stage. The result of arteriosclerosis: hardening of the blood vessels, lumen narrowing, occlusion caused by ischemia; vascular elasticity is reduced, when the blood pressure rises, it is easy to rupture the blood vessels, causing bleeding. This eventually leads to dysfunction and failure of the heart, brain, kidneys and other major organs, resulting in reduced or life-threatening quality of life. Prevention of cardiovascular disease is to prevent atherosclerosis: As we age, atherosclerosis is the natural degeneration of blood vessels, but many factors can contribute to its early occurrence. Some expert studies have concluded that: the possibility of atherosclerosis occurring in humans after the age of 55 is almost 100%, only the degree varies. In recent years, research has found that the age of atherosclerosis is advancing, and it is now not uncommon for atherosclerosis to occur in the 30s and 40s. As long as there is hardening of the blood vessels, there is a possibility that spasm will be induced by exertion, stress, excitement, and cold, leading to ischemia. Therefore, prevention of atherosclerosis should be started from children, starting from now. 3.Risk factors promoting atherosclerosis: Major factors: hypertension, hyperlipidemia, smoking, diabetes, family genetics. Secondary factors: sleep apnea, obesity, hyperuricemia, hyperhomocysteinemia, chronic high tension, excessive stress, too little physical activity, irregular life, excessive fat and salt intake, infection by certain pathogenic bacteria, etc. 4, the prevention of risk factors: control of hypertension: hypertension is one of the main risk factors of atherosclerosis, but also one of the results of atherosclerosis.