This calculator will help you to find the amount of energy expended while at rest in a
neutrally temperate environment. In order to maintain vital body functions some
energy must be expended. An easy way to estimate the calories burned.
Burned energy comes from vital body organs as heart, lungs, brain and rest of nervous system, liver,
kidneys, sex organs, muscles and skin. BMR decreases with age and loss of muscle mass and increases with
cardio workout growth of muscle mass.