Because if you control your diet, you really lose weight faster, but it is easy to rebound. I don't advocate doing this because it will rebound and gain weight.
If you exercise to lose weight.
Exercise takes a long time. In order to have the corresponding effect. Not one day, two days, three days, four days, five days.
It will take at least half a month to see the results. This has a greater impact.
I suggest that if the two are combined, eat for five minutes. Never eat midnight snack or anything.