国庆节过完了，老实讲，你胖了几斤？

最显著的变化，是不是那个肉呼呼圆滚滚的小肚子？

Big belly, double chin, thick neck… these are images coming into your mind when people talk about obesity.

大肚子、双下巴、粗脖子……谈及肥胖时，你的脑海里总是会浮现这些画面。

Besides an apple-shaped appearance, people can also find out whether they are obese through their Body Mass Index, which is obtained by an equation: weight/height squared. Those whose BMIs are over 30 kg/㎡are considered overweight.

除了像苹果身材，人们也能根据BMI指数判断自己是否属于肥胖人群。BMI指数=体重/身高的平方，BMI指数超过30 kg/㎡ 的则为超重。

The problem is, why do people with normal BMI still have a big belly? Although they are able to wear smaller-sized clothes, why is belly fat still forcing them to give up tight clothes?

问题是，为什么有的人BMI指数正常，肚子仍然很大？虽然可以穿小号的衣服，但为了遮肚子，这些人还是要避免穿紧身的衣服。

The reason is, it isn't just regular fat. It is visceral fat.

答案就是，肚子大不是因为一般的脂肪，而是内脏脂肪。

visceral ['vɪsərəl]：adj.内脏的

Different from subcutaneous fat, which is directly under the skin, visceral fat is found around organs in the abdominal cavity, including the liver, pancreas and kidneys.

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