Comparison of cardiorespiratory responses to graded upright exercise of normal men aged 20-29 and 30-39.
Open Access
- 1 July 1966
- Vol. 28 (4), 557-565
- https://doi.org/10.1136/hrt.28.4.557
Abstract
Treadmill exercise of graded intensity performed by 50 normal men in the age-groups 20-29 and 30-39 years resulted in significantly higher blood pressures and peripheral resistance values for the older men. Group differences in heart rate, cardiac output, stroke volume, and certain ventilatory variables were minimal, but trends towards lower cardiac output and increased ventilation, O2 utilization, and CO2 elimination were recorded after the age of 30. In this group, therefore, maintenance of perfusion and the organism''s exercise capacity is achieved at the price of significantly raised ventricular work and energy expenditure.This publication has 23 references indexed in Scilit:
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