摘要：Dear Editor-in-Chief: Smoking is a major risk factor of several types of cancer and cardiovascular disease. According to WHO report, every year, approximately 6 million people worldwide die of heart diseases, lung cancer, or other diseases associated with tobacco smoking. If this trend continues, 8 million people are estimated to die every year by 2030. From this perspective, smoking is obviously a serious health-related issue. Regular exercise is recommended for the prevention of coronary heart dis-eases, as it counterbalances the prevalence of the-se diseases. Heart rate response and coronary heart disease are highly correlated.
