Physical quality refers to a person's ability to be competent in daily work (study) without feeling tired, at the same time, to spare no effort to enjoy leisure and to cope with sudden changes and pressures.
The concept of physical fitness originated in the United States, and the above definition was put forward by the President's Sports and Competitive Committee of the United States in 197 1.
The World Health Organization defines physical health as: the body has enough vitality and spirit to carry out daily affairs without excessive fatigue, and has enough energy to enjoy leisure activities and the ability to cope with sudden neurological events.
The difference of physical quality between adults and children;
Compared with adults, children aged 3- 15 have basically no ability to cope with work, and more importantly, they have to cope with learning. Therefore, for children, physical fitness is the comprehensive ability of children's physical fitness to adapt to learning, life, sports and environment.
The elements of teenagers' physical fitness are mainly divided into two parts: technical physical fitness and healthy physical fitness. Physical fitness related to motor skills such as agility, balance, coordination, explosive force, reaction time and speed; Physical fitness related to physical health, such as cardiopulmonary endurance, muscle strength, muscle endurance, flexibility, body composition, etc.