National fitness and national self-defense are more grounded than national fitness. National fitness emphasizes the concept of national participation. Physical fitness can be improved through simple exercise without limiting places and equipment. Suitable for people of all ages and different constitutions, so it is more grounded. It is initiated by the government or community organizations, free or low-cost, with strong popularity, and has received extensive social attention and participation. National fitness also pays attention to the publicity and education of healthy lifestyle, encourages people to develop good living habits and promotes physical and mental health. The places and equipment for national self-defense require higher age and physical conditions, so national fitness and national self-defense are more grounded than national fitness.