1. Play table tennis to prevent myopia

Playing table tennis can prevent myopia. This is because the important cause of myopia is eye fatigue. When the eyes look at close objects, the curvature of the lens increases, thus enhancing the ability to bend light, so that the object falls on the retina, thus seeing the object clearly; Looking at distant objects, you don't need to adjust. People who have been engaged in close work for a long time are prone to visual fatigue because their lenses are always in a state of high adjustment. At the same time, when looking at nearby objects, the two eyeballs converge in the direction of the nasal root, so that the eye muscles press the eyeballs. Over time, the axial length of the eyes will gradually become longer, causing myopia. When playing table tennis, the eyes must keep a close eye on the fast ball that shuttles back and forth, flickering, approaching and far away, and rotating, so as to make the eyeball move continuously, enhance blood circulation, improve the function of eye meridians, thus eliminating or alleviating eye fatigue and preventing myopia.

2. Bouncing exercises can strengthen the brain and improve intelligence.

Exercise is the best for the brain, because exercise can stimulate a variety of neurotic vitality in the brain, making the brain's thinking and reaction more active and agile. At the same time, exercise can improve heart function, speed up blood circulation, and make the brain enjoy more oxygen and nutrition. All aerobic fitness exercises have the function of strengthening the brain, especially bouncing, which can supply enough energy to the brain, and can be called the best, such as skipping rope, kicking shuttlecock, jumping rubber bands, dancing and so on. "Stand at attention" training to create excellent legs "Stand at attention" training is very effective in correcting teenagers' O-legs and X-legs, which has been confirmed by physical education teaching practice. The specific way is to "keep a regular posture and lift your abdomen, and stand with your legs as straight as possible." O-legged people should put their feet together and try to get together. If necessary, you can tie rubber bands with suitable elasticity on your knees to increase internal support. For people with X legs, the knees should be close together and the heels should be tilted inward as much as possible. If necessary, you can tie a rubber band with suitable elasticity at the ankles of your feet to increase the power of leaning inward. Do it several times a day for more than 20 minutes each time. The number of times can also be increased or decreased according to different people, but the duration of each time should not be less than 15 minutes.

3. Long-distance running contributes to growth and development.