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June 10, 1950

UNILATERAL EXERCISE

JAMA. 1950;143(6):559. doi:10.1001/jama.1950.02910410045013
Abstract

Unilateral progressive resistance exercise has been shown to augment the strength and endurance of the limb exercised and also of the unexercised contralateral extremity.1 Previously published reports had mentioned this phenomenon and had served to draw attention to the possibility of cross education of extremities if the patient would cooperate and was properly trained. A recent report2 presents additional data on the influence of exercise on work capacity.

The restoration of function when loss of strength and endurance is the primary cause of the physical disability depends on systematic exercise in the "overload" zone. The amount of work performed must exceed that normally performed with ease. Furthermore, the voluntary cooperation of the patient is essential. To overcome fear of pain, unconscious malingering and other retarding factors, simple and readily accepted methods of augmenting work output are important.

Hellebrandt and Houtz2 postulated that the contraction of homologous parts

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