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ARTICLE |

Gaseous Exchange and Physiological Requirements for Level and Grade Walking.

JAMA. 1922;79(19):1633. doi:10.1001/jama.1922.02640190071040.
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ABSTRACT

This monograph, from the Carnegie Nutrition Laboratory, Boston, is a report of an extensive series of measurements of the energy required by standing, walking on a level, and walking up grade at varying speeds. The energy requirements were calculated from the gaseous exchange, the subjects being fitted with a gas mask that permitted accurate determination of oxygen consumption and carbon dioxid output. The results are not new to science, but are probably the most accurate and extensive so far reported. Considerable skill is shown in devising experimental procedures that permit accurate energy measurements without placing the subject in too abnormal conditions. Dr. Smith finds that standing requires about 12 per cent, more calories than lying horizontal, while horizontal walking requires about 0.5 gm. calory for each kilogram of body weight transported a distance of 1 meter. This factor remains practically constant up to a speed of walking exceeding 80 meters

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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