The power lever: an instrument for measuring muscle power.

Abstract An instrument, referred to as the power lever, was devised and constructed. It measures directly the horsepower developed in a variety of single explosive movements of the body, and is based upon the mechanical principle of power, that is, the rate of doing work. Used on a sample of 85 college males, the average horsepower developed in four movements ranged from .27 to .45. The reliability of the tests ranged from .9266 for preferred leg extension to .9772 for preferred shoulder flexion. The coefficients of objectivity for these two tests are .8858 and .9454 respectively.