Recently, the State General Administration of Sports and the Ministry of Education released the 2000 National Physical Fitness Monitoring Bulletin, which showed that the physical quality of young people showed a decreasing trend. Experts confirmed that some young people often have back pain, back pain and leg cramps directly related to the decrease in physical quality. The annual physical fitness monitoring covers three aspects: physical form, physical function and physical quality. The target of the monitoring is Chinese citizens aged 3 to 69 years old. Researcher Wang Mei of the Institute of Sports Science of the State General Administration of Sports told reporters that the physical fitness of children and adolescents (students) is on an overall decreasing trend, especially the decline in muscle strength, endurance and flexibility. In addition, the muscle strength of manual laborers is better than that of non-manual laborers; the speed, agility, balance and reaction ability of non-manual laborers are better than that of manual laborers. What is the impact of the decrease in muscle strength, endurance and flexibility on health? Wang Mei, a researcher at the Institute of Sports Science of the State General Administration of Sports, said that flexibility is tested by seated forward bending, the trend of declining flexibility in men is particularly significant, with the average score falling from 10 cm to 8. 8 cm. Li Liyan, a researcher at the Institute of Sports Science, explained that flexibility is a morphological function characteristic that supports the motor organs, which determines the “amplitude” of people’s various movements. The term “flexibility” is used more to describe the overall flexibility of the body’s joints. Poor flexibility is actually poor flexibility of the joints. Poor joint flexibility often limits the ability to play strength, speed and coordination, reducing the coordination within muscle groups and muscles. Poor flexibility, a slightly larger range of motion, there will be back pain, back pain, leg cramps. To avoid these problems, usually do more exercises to improve flexibility, such as flexion, extension, bending, turning and other movements, these exercises can improve the flexibility of the joints. Balance is also one of the physical fitness tests with a significant downward trend. Good or bad balance is judged by the length of time standing on one foot with eyes closed. Balance relies on the proper distribution of tension in each muscle group, which is built on the basis of the interaction of vision, proprioception, locus coeruleus and tactile sensation. When it comes to the harm of decreased balance, Wang Mei said, for example, that it is often seen in traffic accident reports that a car that was originally going right drove to the left side of the road, which is mostly thought to be caused by the driver’s drunkenness, etc. However, some of them are caused by decreased balance ability, which produces misjudgment of position. The improvement or maintenance of balance can also be achieved through sports activities, Li Li research, sports programs such as ice skating, diving, rowing, rowing, walking stumps, etc.; leisure and recreational projects in the yacht, bungee jumping, rafting are better activities to improve balance. Experts believe that the main reason for the decline in physical fitness of adolescents is that the muscle strength of manual laborers is better than that of non-manual laborers, and muscle activity and outdoor activities are less. The decline in physical fitness should not be ignored, it suggests the first signs of some health problems, if not adjusted, this may lead to low metabolism, muscle strength decline, neurasthenia, poor cardiopulmonary function and reduced adaptability. In order to prevent these problems from occurring, you should develop the habit of physical exercise. Experts especially remind young people with stressful work and irregular life, it is also a good way to take time off from work to exercise in daily life. Long-distance running, bicycling, swimming are easy to do and good projects.