The ancient concept of health is often divided by whether it is sick or not. Disease is unhealthy, and no disease is healthy. The modern scientific definition of health refers to the dynamic balance between the body and the natural and social environment. 2/KLOC-0 The four elements of social health in the century are physical health, mental health, social adaptability and moral health.
Second, the necessary knowledge of physical exercise
Warm-up activities should be carried out before physical exercise, giving the body an adaptation process, and finishing activities should be carried out after exercise, so that the body can gradually calm down, so as not to cause harm to the heart. Physical exercise should develop in an all-round and balanced way. You should also take part in a variety of sports activities to exercise in an all-round way, strive to overcome the limitations of a single physical activity on your physical development, and ensure the balanced development of the functions of your various organs. Take part in physical exercise more persistently. Zhang Chi has its limits, so you can't "get cold for ten days", or your health will be far away from you.
Third, grasp the exercise load.
Muscle aches after physical exercise. It may be the performance of excessive exercise, reflecting that you are not suitable for excessive exercise; It may also be a natural reaction after exercise, because during exercise, muscles will produce a substance called lactic acid, which will stimulate your body and make you feel sore. As long as you keep exercising, this phenomenon will gradually disappear and your physical fitness will be improved in this cycle of physical reaction. If you stop exercising because you feel muscle soreness, it will weaken the fitness effect of physical activity until the muscle soreness disappears.
1, elimination of exercise fatigue. After general exercise and proper rest, there is no sense of fatigue, which is the performance of moderate exercise. If you wake up the next day and still feel tired and heavy, it is a sign of excessive exercise.
2. Pain caused by excessive exercise can help the body recover actively by losing weight, rest, massage and hot compress. It's hard to concentrate. I always want to doze off in class, I always make mistakes in my homework, and my reaction to things becomes slow, mostly because of excessive exercise. Elevated blood pressure, listlessness, irritability, pallor, etc. If it is caused by exercise, it is a sign of excessive exercise.
Four. Measures and prevention of safety movement
1, prevention:
Before exercise: During physical exercise, you should not wear medals, knives, pencils, keys, watches and other items, and put on sports shoes and sportswear. , and organized and step-by-step exercise with peers to prevent injury accidents. When doing physical exercise, we should pay attention to the safety of sports venues and equipment and the correct dress to prevent accidents.
There are various safety precautions in sports: someone must be protected when crossing the equipment; When you fall forward, roll forward with the trend, don't hold it with your hands; When you fall backwards, let your body fall naturally, don't support the ground with your hands, and turn backwards. In order to prevent sports injuries, we should try to avoid falling, pay attention to wearing non-slip sports shoes, abide by the rules, and reduce unreasonable physical collision and friction.
2. Measures: In case of contusion, muscle strain, joint sprain, bursitis, tenosynovitis and other internal injuries. Methods such as cold compress, pressure dressing, and raising the injured limb are generally used within 24 hours to minimize bleeding at the injured part and avoid aggravation of the injury; After 48 hours, once the local bleeding and swelling stop, massage, physical therapy or drug treatment can be carried out at this time to gradually restore the function of the injured part; The injured part basically recovered. In the case of strengthening protection, you can do general exercises without collision until you are safely recovered. When muscle spasm (cramp) occurs, the common relieving method is to lengthen the spasmodic muscles, and at the same time cooperate with local massage and acupoint pressing to promote relief. In the fierce competition, if you stop running, or even stop, you may have weak legs, pale face, dark eyes, tinnitus and other phenomena, and in severe cases, you may faint. This symptom is called dynamic shock. You can relax by walking slowly, moving your joints, pulling, shaking and massaging.