Warm-up activities are to stretch the bones and muscles, so as to avoid hurting yourself in high-intensity activities when the body is not fully stretched, the strength is not enough, and the body coordination is poor. It is easy to strain and sprain, and it may also hurt the ankle, knee or waist because of excessive movements during exercise. General warm-up includes walking, jogging and some stretching exercises.

In this way, the body temperature and muscle temperature will increase, so as to perform better in the next exercise or improve the efficiency of exercise. In addition, warm-up exercises help to prevent injuries. Mentally, effective warm-up exercise can also improve the body's awareness of the upcoming exercise.

Extended data

1 can improve the metabolic level and body temperature of the body.

The increase of body temperature is beneficial to improve the contraction and relaxation speed of muscles and improve the contraction strength. It can also make hemoglobin in the body and myoglobin in the muscle release more oxygen; It is easy to improve the excitability of nervous system, improve the ductility of muscles and ligaments, and prevent muscle strain during exercise.

2. It can improve the skill level of internal organs.

Compared with skeletal muscle function, the function level of internal organs is mobilized and recovered slowly after exercise. For example, when the leg is lifted in a low posture and high altitude, the skeletal muscle can immediately contract to complete the action, but the functional indexes such as heartbeat and breathing in the body change slowly, and generally the heart rate and breathing frequency in the body accelerate after the action is completed.

Therefore, this phenomenon that the changes of muscle function and heart function are not synchronized can also reduce the lack of oxygen in the body during exercise, just like you don't want to run at ordinary times, and you have the desire to run as soon as you get hot.