Abstract
Equipment was assembled to record resting muscle action potentials electromyographically at a very high sensitivity level (10 microvolts per cm. of needle deflection). Electromyograms for seven subjects having chronic muscular involvement of the shin splint type were recorded before and after static stretching procedure was administered. In six of the seven subjects muscle action potentials were markedly reduced after the stretching procedure while in one subject an increase was observed. Of the six subjects who showed lowered electromyograms those who had pain symptoms at the time of experimentation also showed some measure of symptomatic relief.

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