Human power

upright=1.5|thumb|right|A competitive swimmer performing the [[breaststroke]]

Climbing is the activity of using one's hands, feet, or other parts of the body to ascend a steep topographical object that can range from the world's tallest mountains (e.g. the eight thousanders) to small boulders. Climbing is done for locomotion, sporting recreation, for competition, and is also done in trades that rely on ascension, such as construction and military operations. Climbing is done indoors and outdoors, on natural surfaces (e.g. rock climbing and ice climbing), and on artificial surfaces (e.g. climbing walls and climbing gyms).

manually operated water pump for a well

thumb|upright=1.3|British penal treadwheel A treadwheel, or treadmill, is a form of engine typically powered by humans. It may resemble a water wheel in appearance, and can be worked either by a human treading paddles set into its circumference (treadmill), or by a human or animal standing inside it (treadwheel). These devices are no longer used for power or punishment, and the term "treadmill" has come to mean an exercise machine for running, walking or other exercises in place.

work or energy produced from the human body

thumb|upright=1.35|A treadle loom; the treadles raise and lower the two heddles. The heddles are connected by a rope over the [[heddle pulleys, so that they rise and fall alternately. One treadle is attached to the bottom of each heddle.]]

wooden human-powered hoisting and lowering device