Reader Xin Yi King left a message on his face on July 17, 2019: "Please teach me~ I read your blog's evening sports article and heard a teacher say that it is not suitable to go to parks or tree forests to exercise at night because plants w...
Reader Xin Yi King left a message on his face on July 17, 2019: "Please teach me~ I read your blog's evening sports article and heard a teacher say that it is not suitable to go to parks or tree forests to exercise at night because plants will release carbon dioxide, which is not good for the body. I wonder if this is true? Or the other way around."
The "evening sports article" mentioned by this reader is "evening sports are harmful to health" published by me on July 19, 2017? 》. In this article, I denounce the saying that running at night is harmful to health. So, now this reader will come to ask whether it is suitable to go to the park or tree forest to perform at night.
is indeed said that trees release carbon dioxide at night or early morning, so it is harmful to health to go to parks or forests during these periods. For example, some media published an article Why is the early walking movement a person seeking death in the eyes of experts? , and what it says is Lin (written a book called "Walking is the King of Nursing Life").
But, is the carbon dioxide released in trees or parks really harmful to health and even fatal?
Do these so-called experts, experts, teachers, and teachers know what concentration of carbon dioxide will have to affect health? Not to mention fatality?
According to the Carbon Dioxide Health Hazard Information Sheet issued by the U.S. Department of Agriculture, the carbon dioxide content in outdoor air is usually 300 to 400 ppm (0.03% to 0.04%), but in metropolitan areas, it can be as high as 600-900 ppm.
Similarly, based on this information, the Occupational Safety and Health Administration allows a working environment carbon dioxide concentration of 5,000 ppm, and of course it is in a 10,000 ppm environment. There are many people who feel sleepy, but it has no impact on health. As for the possible fatal concentration, it is greater than 80,000 ppm (that is, greater than 200 times the carbon dioxide concentration in normal air).
According to a 2017-4-4 article Carbon dioxide poisoning: a literature review of an often forgotten cause of intoxication in the emergency department, the carbon dioxide concentration must exceed 50,000 ppm before it can cause hypercapnia and respiratory acidosis.
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Then, do you want to guess how high the carbon dioxide concentration in the trees at night?
According to a 1988 paper Carbon dioxide in the atmosphere over the Amazon Basin, the highest carbon dioxide concentration in the Amazon forest at night is 380 to 400 ppm.
Why, if you go for a walk or do sports, you may have a fatal carbon dioxide concentration (80,000 ppm)? Or, is there a carbon dioxide concentration (10,000 ppm) that has no effect on most people?
Or, have you ever thought about how high the carbon dioxide concentration will be if the audience reaches a field with a large number of people, especially indoor basketballs? You know, everyone is always placing a lot of carbon dioxide, so why do we still risk our lives to watch the game? Why do athletes still have to give up their lives?
Although the media article said "the reason is scientific", I have not seen it provide any scientific evidence. The only thing I see is the so-called expert opinions, and these opinions are obviously just these "expert" inferences rather than scientific evidence.
In fact, there is no scientific evidence to show which time of day is the most suitable exercise. I also say that the best time to do sports is "the time that can make you persist." In other words, being able to persevere is what you should pursue, not what time of day.
As for the location of the movement, I am in the air pollution. I am still in the air pollution. I must avoid places with serious air pollution, and the park is an ideal location.
In short, there is no time that is not suitable for sports, and whether it is a park or a tree forest, it is very suitable for sports.
Original text: Is it not suitable to go to the park or tree forest to perform at night?
