Let’s explain this phenomenon to northerners.

Theoretically, the colder the place, the taller, fatter the mammals will be. After all, the ratio of biological area to volume decreases as the body size increases. The taller the organism, the less likely it is for heat to escape. Also at minus 20 degrees, if you go shirtless, a 90-pound person will definitely freeze to death earlier than a 150-pound person. In turn, a small body is conducive to heat dissipation, and you will feel better if you are thinner in summer. So generally speaking, the same mammal is smaller and smaller closer to the equator, and taller and larger closer to the poles.

●The size of a bear is positively correlated with its latitude

my country’s obesity map also generally conforms to this pattern: the north alone is in the top ten, the coldest three northeastern provinces are at the top, and the hottest No matter how rich Guangdong is, it will never be rich or heavy.

Coldness is not the key to the obesity of northerners

But humans are superior mammals after all. Advanced production methods mean that everyone does not have to rely on the weather for food, and there is no need to strictly follow the rules. You will gain weight or lose weight in the heat or cold. What's more, thanks to the heating in the north, Beijing is not necessarily colder than Wuhan during the three-month winter.

When we look around the world, we will find that although the fatness and thinness of people in various countries are related to hot and cold, they are actually scattered.

●Global obesity distribution. If we separate the north and the south of China, the north of China should be red

Cheap.

Taking late October 2012 as an example, the price of pork in Shanghai, Tibet, Hainan, and Yunnan was all higher than 16 yuan, while the price of pork in Shandong, Liaoning, and Heilongjiang was all lower than 13 yuan; the price of eggs was above 16 yuan. , Heiji, Liaoning, Tianjin, Shandong, and Shanxi are all lower than 4.6 yuan/jin, and southern provinces such as Hainan, Guizhou, Guangxi, and Yunnan are all higher than 5.6 yuan/jin; chicken prices are higher than in Guangdong, Fujian, Guizhou, Chongqing, etc. 10 yuan/jin, and lower than 8.2 yuan/jin in Heilongjiang, Jilin, Hebei, Henan, Shandong and other places.

The prices at other times are similar. The prices of pork, chicken, and eggs in most areas of the north are 20% lower than those in most areas of the south. And these three account for exactly half of the Chinese people’s protein sources.

As for the price of low-calorie vegetables, taking Heilongjiang as an example, the seasonal fluctuations in vegetable prices show a "V" trend. They are cheaper in summer and more expensive in winter. Vegetable prices in the south are only slightly affected by this.

Among the most common vegetarian ingredients in northern winter, potatoes pretend to be vegetables and occupy a large part of the dinner plate. Therefore, many northerners are lighter in summer than in winter. In addition to the cold weather increasing appetite, changes in ingredients are also an important reason.

In other words, in the north, if you cook for yourself, you will be more inclined to buy meat, poultry, eggs, and milk; if you order takeout, the merchants will be happy to put more meat, poultry, and eggs, which will help you gain weight. A solid foundation was laid

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