We could have a new unit of power called the 'metabolic'. Normal air pressure of 14 psi or 101 kilopascals is called an 'atmosphere' which is a little more than 1 bar in metric units. To illustrate the term you might put 2.5 atmospheres of air pressure in your tyre. If say 1 metabolic = 200 watts then a middle class person may burn more than 10 'metabolics' or 2000w in continuous averaged use of food, fuels, electricity and embodied energy depreciation of houses and large items. Seen that way that makes us by far the most wasteful animal that ever lived.