Estimations of physical activity expenditure

Energy expenditure: How the body burns calories
The human body converts the food consumed by the individual into energy. The amount of energy provided by food is typically measured either in calories or kilojoules. This website provides a general overview on the process.
Physical activity and energy balance
This quick reference guide aims to assist health professionals provide advice to adults regarding the role of physical activity and energy balance in preventing weight gain.

How does exercise impact weight loss?

In this animation (developed and produced by http://www.MechanismsinMedicine.com), we discuss the concept of physical activity and exercise as they relate to obesity. In humans there is a fine balance between energy intake and energy expenditure.