The quickest way to lose weight is exercise and dieting. In this situation, you might as well try to skip lunch and just eat breakfast, and eat less. Or just eat cucumbers every day, but remember, you can't eat anything or drink water after seven o'clock in the evening. If you can't go out for exercise, you can climb the stairs for half an hour to an hour every day, because it takes 40 minutes to lose weight through exercise. You can also run for an hour in the same place, which is very effective, but you must pay attention to your diet, just eat cucumbers and boiled vegetables.