Physical fitness determines the strength of adapting to the external environment. Good constitution, strong resistance, not easy to get sick and healthy.
2.
Body composition: that is, the percentage of various components in the human body. Keeping the body composition in the normal percentage range is of great significance for preventing some chronic diseases such as diabetes, hypertension and arteriosclerosis.
Muscle strength and muscle endurance: muscle strength is the maximum strength that muscle can produce, and muscle endurance is the ability of muscle to contract continuously, which is the basis of normal work of the body.
Cardiopulmonary endurance: Also known as aerobic endurance, it is the basis of the body's long-term work and is considered to be the most important factor of healthy physique.
Flexibility: the maximum range of joint movement without feeling pain. It is of great significance for maintaining human sports ability and preventing sports injuries.
Instantaneous strength: refers to reaction time, which is a comprehensive performance of other physical abilities (speed, reaction time, muscle strength, agility and coordination). Good response time, good crisis handling ability.