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.
The amount of time it takes individuals to lose 10 pounds by exercising depends on their current body weight and calorie intake as well as the intensity and frequency of their exercise routines. A person with more body mass will generally burn more calories than a person of smaller mass doing an identical exercise routine, according to WebMD.
Certain models of exercise equipment, such as treadmills with adjustable speed and incline features, allow users to increase the intensity of their workouts, effectively increasing the rate at which they burn calories, according Shape.