According to Yahoo Shine, an individual who is at least 40 pounds overweight can lose 20 pounds in 20 days by following a 1,500 calorie diet and a cardiovascular workout regimen. Certain foods, including red meat and white starches, are to be eliminated completely.
A personal trainer from Yahoo Shine recommends breaking down the 1,500 calorie diet into 6 small meals, 3 of which must include protein and all of which must include fruits or vegetables. For the first 2 weeks, one should do at least 30 minutes of cardiovascular activity, including running and cycling, 5 to 6 times per week. After the first two weeks, light weightlifting should be incorporated.