Watt

A watt is the SI unit for power. A watt is equal to 1 Joule per second [math]1 \frac{J}{s}[/math], or [math]1 \frac{kgm^{2}}{s^{3}}[/math] (energy in an amount of time). A watt of power is about equivalent to a person holding out their arm and moving their fist up and down each second.

Deep knee bends output about 100 W of power. This is about the average total power input of a person over a normal day, which is why R. Buckminster Fuller came up with the idea of this calling this an energy servant. Since it's actually a unit of power, this site discusses them as power servant.

The average power use (end use rather than primary), for a typical person in Canada or the USA, taken over the course of a day, is about 10,000 W.

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For more information on the watt, click here.