Running is a special exercise to test endurance. In hot summer, the sun will make people feel tired, so you should avoid the sun when running outdoors. Even if you are not afraid of tanning or heat, running in the sun will still do some harm to your body, because the sun contains ultraviolet rays, which have strong penetrating power and will damage the activity of your skin, so it is not recommended to run in direct sunlight.

The time to avoid direct sunlight is probably in the early morning and evening, but when we are running, too dim light will affect our eyesight and be prone to some dangers, so we should choose the time when the sun rises and sets.

If you choose to run in the morning, because there is no sunshine for several hours at night, the surface temperature is relatively low, and your body generates heat during exercise, so you won't feel particularly hot when running, and the first sunshine in the morning is really comfortable after running.

Another advantage of running in the morning is that after a whole night's sleep, all the functions of the human body are still dormant. Although people are awake, their bodies have not fully recovered. If you take part in some activities at this time, you will feel that your body is unable to work hard. This feeling may sometimes accompany you all day, leaving your mental outlook in a relatively closed state.

Morning running will gradually awaken the normal operation of various functions of the body through exercise, so that the whole day is particularly energetic and there will be no feeling of procrastination. The advantage of exercising in the morning is that you can feel particularly energetic all day. The mental outlook of the whole day determines today's work efficiency, so morning exercise is the best time.

Because running can make the body into an active state, it is not easy to fall asleep when all parts of the body are in an active state, so some people run at night, which will affect their sleep. Exercise makes the brain congested, and it is not easy to enter a good sleep state when the cerebral cortex is active. Even if they fall asleep, it will have an impact on their health. People who run for fun often have nightmares, which is a burden to their health after a long time, so running at night is not recommended.

Therefore, in combination with the above points, summer running time should be chosen in the early morning. One is to avoid direct sunlight, and the other is not to affect sleep. Third, morning running can awaken the functions of all parts of the body to a certain extent and make it work normally. During this whole day, the whole body will look brand-new, thus completing the day's work and study more efficiently. Exercise in the morning, the air is fresher, and the health of the body will only increase rather than decrease. Therefore, it is best to choose summer exercise time.