The biggest role of dieting is to lose weight ... I used to lose weight instead of losing weight ... I lost muscle instead of fat after long-term dieting ... and it is easy to rebound ... It is too complicated to explain in detail ... Let me explain briefly ... There are three things that produce energy in the human body ... sugar ... fat ... protein ... The content of sugar is very small .. The energy produced by unit sugar is not the most ... but the productivity of sugar. ... but because there is little sugar ... everyone can finish this part without dieting ... This is fat ... The energy per unit of fat can be the highest ... but the production efficiency is very low ... In the process of dieting and normal life or exercise ... When sugar is consumed ... the body still needs energy, it will consume a lot of fat ... So far, dieting is effective ... because it can consume fat ... After the country ... the body is not fully replenished ... it will start to consume protein ... that is, muscles ... for the sake of living energy ... at this time, the weight will still drop ... but most of the falling parts are made of muscles ... The body will become weaker and weaker ... to some extent, it will appear more "fat" ... because it is puffy .. In this case, it will rebound badly ...