You can do 1 time or twice a day, depending on whether your conditions are met. Whether the time can be arranged, you can do it for more than half an hour and less than half an hour at a time, and basically do not consume fat. If you have enough time, you can do it in the afternoon or evening. Also pay attention to drink more water, don't dehydrate, have a light diet and eat less sweets. Persistence will be effective. There is no limit to the number of times you do it.