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"Uncle Li, the results of your physical examination this time are out, which is a bit not good."
"What's wrong, doctor? I insist on exercising outdoors for 1 hour a day, how can this detect cancer? ”
Uncle Li is an ordinary bank clerk who just turned 50 this year. When he was young, he had a great body and could do anything. But when he reached middle age, he found that he was gradually getting richer, and his physical strength was not as good as before.
In order to stay healthy, he ran in the park for 1 hour every day at the suggestion of a friend, and he ran for 5 years. Every time, he felt as if he had changed back to the sturdy young man he had been when he was young, as light as a swallow, and in a comfortable mood.
But the results of this physical examination gave him a blow to the head, and he didn't understand why he insisted on outdoor sports and got cancer instead.
"Uncle Li, it's a good thing that you insist on outdoor sports every day. But there are a few things that are done wrong, and they bring hidden dangers to the body. The first thing, the doctor said, is that the sun protection is not in place.
Although outdoor exercise is good for your health, if you are exposed to ultraviolet rays for a long time and do not take good sun protection measures, the risk of skin cancer will greatly increase.
Uncle Li nodded straightly, recalling that after exercising every day, his skin was tanned, but he never cared about the importance of sun protection.
The second thing is the choice of exercise time. Uncle Li likes to exercise in the morning or afternoon, when the sun's rays are stronger and the ultraviolet radiation is the most violent.
Between 10 a.m. and 4 p.m., when UV rays are at their strongest, people who exercise outdoors during this time are five times more likely to develop skin cancer. Doctors recommend that outdoor exercise is best chosen in the early morning or evening, which can effectively reduce UV damage.
The third thing is air quality. Uncle Li runs in the park in the city center every day, but as everyone knows, the city's air quality is not ideal. Long-term exercise in a polluted environment can increase the risk of respiratory diseases and even induce cancer.
Areas with poor air quality have four times higher rates of lung cancer than those with good air quality. Doctors recommend that when exercising outdoors, it is best to choose a place with better air quality, or switch to indoor exercise on days with high air pollution.
Uncle Li has always thought that outdoor sports are a harmless way to health, but he didn't expect that there would be so much attention to it. Seeing that he was lost in thought, the doctor continued: "There is one more thing you may not have noticed, and that is the intensity and pattern of exercise. ”
Uncle Li looked puzzled: "I run for an hour every day, this intensity should be fine, right?" ”
The doctor shook his head and explained: "Excessive exercise can also increase the burden on the body, especially in the middle-aged and elderly population. Excessive exercise can not only cause joint damage, muscle fatigue, but also immune system disorders.
People who exercise for more than 1 hour a day are twice as likely to have an abnormal immune system than those who exercise moderately every day, which increases the risk of cancer. ”
Uncle Li suddenly realized that he had been "over-exercising" for the past 5 years. Doctors suggest that middle-aged and elderly people can exercise for 30 minutes to 1 hour a day, and moderate exercise can not only maintain good health, but also avoid unnecessary risks.
After listening to the doctor's explanation, Uncle Li finally understood that there was something wrong with his health concept. Although outdoor sports are good, they also need to be carried out scientifically and reasonably in order to truly play their positive role.
Before leaving, Uncle Li remembered another question that had been bothering him for a long time: "Doctor, how should I exercise now?" Can you still run? ”
The doctor smiled and replied, "Of course, you can continue to run, but there are a few things to pay attention to." First of all, choose a time period when the UV rays are weak for exercise, and secondly, take sun protection measures, wear a hat and sunscreen.
In addition, try to choose places with good air quality to exercise, and avoid exercising in environments with high air pollution. Finally, control the intensity of exercise, 30 minutes to 1 hour of moderate exercise a day is sufficient. ”
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