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(Circulation. 1953;8:521.)
© 1953 American Heart Association, Inc.

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Age Changes in Heart Rate and Blood Pressure Responses to Tilting and Standardized Exercise

ARTHUR H. NORRIS B.A.¹; NATHAN W. SHOCK PH.D.¹; MARVIN J. YIENGST B.S.¹

¹ From the Section on Gerontology, National Heart Institute, National Institutes of Health, Public Health Service, Bethesda, and the Baltimore City Hospitals, Baltimore, Md.

Tilting and standardized exercise caused extensive shifts of heart rate and auscultatory blood pressures in 140 ambulatory male subjects from 20 to 92 years of age. Following similar exercise, the older subjects showed a greater increase of heart rate and pulse pressure than did the younger subjects who compensated the changes caused by tilting more completely and rapidly than did the older subjects. These slower compensatory responses of older subjects should be considered in the interpretation of metabolic recovery rates after exercise.