Because everyone consumes a basic amount of energy every day, that is, if you don't exercise, there will be a certain amount of energy consumption, but if you exercise, there will be extra energy consumption, so when you reduce energy intake, there will be a need to supplement the fat stored in your body, which will achieve the goal of slimming down, which is why others will lose weight if they eat less.
So compare whether you eat less without increasing any exercise, because although you eat less, you don't increase exercise. What you eat will only make you fat at most, and will not reach the standard of slimming down. If you want to lose weight, you need extra exercise to consume fat. You can supplement and reduce energy intake through fat, so that you can lose weight slowly.
When you lose weight to a certain extent, you can balance exercise and food intake. Because you have reduced your food intake for a long time and increased your exercise, the harm to your body still exists. Therefore, when you feel that the excess fat is almost consumed, you should adjust your exercise, so that when you eat, you can ensure that you are not fat when you consume normal exercise.