The efficiency of human movement???a statement of the problem

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Abstract
The possible causes of this variation is presented where “set points” for biomechanical, physiological, psychological, biochemical, and other factors combine in series to influence the overall energy cost. The various definitions of “efficiency” and “economy” are considered at the whole body and the isolated muscle level, and a discussion of baseline subtraction is presented. The concept of “effectiveness” is reviewed to illustrate the interaction of skilled performance and energy cost. It is recommended that the terms “muscular efficiency,” “muscle efficiency,” “economy,” and “effectiveness” be used in their respective contexts to replace the current diversity of overlapping and, at times, confusing terminology. ©1985The American College of Sports Medicine...

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