According to WebMD, one method of losing 10 pounds quickly involves creating a calorie deficit of 500 calories per day, which allows a healthy person to lose 1 to 2 pounds per week. As the Mayo Clinic explains, a calorie deficit is defined by the difference between the number of calories a person eats and the number of calories the same person burns in a day.
Based on the Mayo Clinic's calculation that 3,500 calories is equivalent to 1 pound of fat or muscle loss, a 500-calorie deficit per day leads to 3,500 calorie deficit, or 1 pound, per week. Avoiding salty and starchy foods expedites the weight loss in the first week by decreasing the amount of fluids a person retains. Based on fluid loss alone, a low-calorie diet can lead to a loss of 5 pounds in the diet's first week.
In addition to lowering calorie intake, any healthy, fast method of losing 10 pounds also includes an increase in calories burned through exercise. WebMD suggests exercising for at least one hour per day aids in achieving the desired calorie deficit. WebMD advises against a diet plan that contains less than 1,050 to 1,200 calories each day. Michael Dansinger, M.D. recommends consuming fruits, vegetables and lean proteins and drinking plenty of water when trying to lose weight quickly.