You cannot lose 20 pounds of body weight in one day.
You cannot lose 20 pounds in one hour by any natural means.
Answer No, through diet and exercise it is not possible. Another answer I think you can lose 20 pounds but you would have to work out every single day and night. If you did that every single day and night you might be able to lose 20 pounds.
The people who answered already obviously can't read! The question is not whether you can lost 20 pounds PER DAY, the question is can you lose 20 pounds in ONE MONTH by eating ONCE PER DAY! It depends on how many calories you eat during that one meal and how many sit ups you do. It would be pretty hard to do. I don't think you could do it unless you eat very little and do sit ups for hours every day. I don't think it's healthy.
Thirty minutes a day is considered a good amount of exercise. And with proper diet, a male can lose the first 20 pounds in about four to six weeks. It might take longer for a female.
Attempting to lose 10 pounds in one week is absurd. You'd have to be on the ab circle 20 hours a day.
It's impossible to lose 20 pounds in overnight. Nutritionists are always recommending 2 pounds of weight loss in 7 days, according these levels it is always recommended to lose 20 pounds in 10 weeks.
2 hours per day?
use a cross trainer for an hour a day that should help
20-30 Pounds in 14-21 Days is one Pound (or more) each day. That's just not a sustainable loss rate.
you don't
The only way to lose 20 pounds in a month is to have mom or dad take you to the doctor for professional help.
The quickest way to lose 20 pounds is to sweat. Your body accumulates water weight which can add up fast.