How many calories does the average body burn a day, even while sitting or raking leaves? Calculate the precise deficit needed to lose 2 pounds a day through diet and activities like biking.
The amount of calories you burn in a 2.5-mile run depends on many factors, including your age, gender, fitness level and body composition, according to dietitian Ellen Coleman. Other factors include your work intensity and duration of the run.
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Skeletal muscles are your body's natural fat burners, according to exercise physiologist William McArdle in "Exercise Physiology: Energy, Nutrition, and Human Performance." Muscles constantly use fat and carbohydrates to keep you warm and provide you with energy for movement.
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