Pursuing health and longevity is one of the important lifestyles of modern people, and health and fitness have long been the fashion and trend in today's society. In the World Health Charter, the World Health Organization elaborated the concept of health and the criteria for measuring health: among many factors affecting human health, 10% ~ 15% depends on medical care, 15% ~ 20% comes from heredity, 20% ~ 25% depends on environment, and lifestyle accounts for the majority. This coincides with our scientific and reasonable concept of fitness and reasonable concept of nutrition. Similarly, a large number of scientific research data show that scientific physical exercise and reasonable nutrition have a unique joint effect on the prevention and treatment of some chronic diseases. Long-term adherence to physical exercise and reasonable nutrition can reduce the incidence of cardiovascular and cerebrovascular diseases, diabetes, cancer and Alzheimer's disease by 35%, the prevalence of osteoporosis by 40% ~ 50%, and prolong life span by 4 ~ 6 years. Therefore, reasonable nutrition and scientific physical exercise are two basic factors to promote health. Only scientific fitness exercise combined with reasonable nutrition can achieve the purpose of strengthening physical fitness, promoting health, maintaining physical fitness, preventing diseases and prolonging life. It is certain that scientific exercise and reasonable nutrition are the king of health.