Journal of Applied Physiology
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J Appl Physiol 38: 263-267, 1975;
8750-7587/75 $5.00
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Journal of Applied Physiology, Vol 38, Issue 2 263-267, Copyright © 1975 by American Physiological Society

ARTICLES

Longitudinal studies of aging in 37 men

S. Robinson, D. B. Dill, S. P. Tzankoff, J. A. Wagner and R. D. Robinson

The physiological adjustments of the men to both aerobic (5.6 km/h, up 9% grade), and maximal treadmill work were first determined when they were healthy college students, ages 18-22 yr. They were restudied at ages 40-44, and again at ages 49-53 yr. In the aerobic walk VO2 increased in proportion to weight gain, but efficiency did not change with age. The men who had gained most weight showed the greatest elevations of heart rate, blood lactate and "ventilatory equivalent," and reductions of the "O2 pulse" in the walk. At age 50 mean "O2 pulse" in exhausting work had declined 13%, even though mean maximal heart rate had declined 15 beats/min from values observed in youth. At ages 40-44 yr mean VO2 max had declined 25% to values 12% lower than mean values reported in 1938 for men of this age. Eight of the men imporved an average of 11% in VO2 max between ages 40-44 and 49-53 yr; mean VO2 max of the others continued to decline with age. The five men who improved most had increased their participation in vigorous activities (tennis, squash, skiing, jogging, etc.) and had quit or reduced their smoking.


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