Work and effort.

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Abstract
In order to investigate the problem how far man''s reaction during daily exercise is determined by work done in physical sense, the reactions of pulse pressure Rp, oxygen consumption RO2 and pulse frequency Rf to a subject''s exercise have been studied as a function of time and of force and displacement. The experiments were performed with three male subjects by using a calibrated bicycle ergometer with which the load could be measured and the values of torque T and revolutions in per minute corresponding with the physical quantities force and displacement, could be chosen independently. It was found that the reactions Rp, RO2 and Rf as a function of time could be described by a linear differential equation of the first order from which the recovery time was derived. For the reactions Rp, RO2, and Rf occurring during an exercise of 2 min, the relative dynamic, static, and kinetic contributions to the effort could be expressed as a function of force and displacement according to an analytical method. Finally, the efficiency of the O2 consumption has been determined.

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