Q:

# How much exercise will it take to lose 15 pounds in two months?

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According to the Mayo Clinic, a person must burn a little under an additional 1,000 calories per day to lose 15 pounds in two months. This calculation assumes 1 pound lost is equivalent to 3,500 calories, or 15 pounds lost equals a calorie deficit of 52,500 calories. The U.S. Centers for Disease Control defines a calorie deficit as the difference between the amount of calories consumed versus the number burned.

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As the Mayo Clinic explains, the number of calories lost during exercise depends on the intensity and length of the exercise and the weight and age of the person. Heavier people burn more calories than lighter people, and younger people burn more calories than older people. According to Harvard Medical School, depending on a person's weight, high-intensity exercises, such as fast running and cycling, can burn between 495 to 733 calories per half hour. A 155-pound person trying to lose 15 pounds could achieve the necessary 1,000-calorie deficit through exercise only by combining one hour of high-impact aerobics, one hour of low-impact aerobics and a half hour of light office work. The National Institutes of Health suggests reducing the amount of sedentary activity and replacing it with activities that burn a higher number of calories.

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## Related Questions

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A 180 pound person would need to walk three miles over the course of an hour every day for three months to burn 10 pounds worth of calories, according to calculations from the University of Maryland Medical System. Walking at a faster pace can burn more calories.

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To lose 10 pounds through exercise, an individual must burn 35,000 calories, according to WebMD. It would take a 150-pound person approximately 87 hours of moderate aerobic exercise to burn 35,000 calories, according to About.com.

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Sit-ups alone are not an effective way to burn any amount of fat, unless they are combined with a diet and exercise program that burns more calories than are taken in each day. AZ Central explains that sit-ups are useful for building and toning muscle but not for losing fat.