The earliest person who wanted to lose weight in history should be Chu in the Spring and Autumn Period and the Warring States Period. At that time, the national army of Chu, King Chu Ling, was slim. And he likes not only his own concubines, but also frivolous courtiers. So, at that time, the whole state of Chu was trying to lose weight. If you don't lose weight, you may lose your head.
In order to lose weight, everyone basically chooses not to eat and eats once a day. Some people eat cloth strips to make their stomachs shrink better. This also led to many people dying of losing weight at that time.
The Song Dynasty had a great constraint on women, and thinness was an aesthetic beauty. At that time, women also used a ridiculous way to lose weight. They put towels in cold water, and then kept rubbing where they thought they were fat. This way is incomprehensible and unreasonable at present. But it was very popular then. It can be said that I was injured and didn't achieve the effect of losing weight.
In the yuan dynasty, the way used by the yuan dynasty was even more absurd. There was an "artifact" to lose weight in the Yuan Dynasty, which was a bristle brush. A brush made of the mane of a horse or pig. You can imagine how ridiculous it is to brush this mane on yourself.
In the Qing dynasty, slimming clothes were used to force people to slim down. Although it is still unreasonable, it is a little better.