caa a22 4500 469054913 CHVBK 20180323132840.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00705071 doi (NATIONALLICENCE)springer-10.1007/BF00705071 Influence of ageing on aerobic parameters determined from a ramp test [Elektronische Daten] [Mark Babcock, Donald Paterson, David Cunningham] Summary: The purpose of this study was to examine the four parameters of aerobic function, the maximum oxygen uptake ( $$\dot V$$ O2max), ventilation threshold (Th VE), efficiency, and the effective time constant for oxygen consumption (τ′ $$\dot V$$ 02), across age. In particular, the study was designed to observe whether there may be accelerated declines in aerobic function beyond 60 years of age. Seventy-nine sedentary men aged 30-84 years were studied. Each subject performed two maximal cycle ramp function tests, and data were collected on a breath-by-breath basis. The $$\dot V$$ O2max, from a plateau in $$\dot V$$ 02, was achieved in 87% of the subjects using the ramp test. The $$\dot V$$ O2max showed a significant decrease with increasing age (from linear regression,r = −0.81) at a rate averaging 0.037 l·min−1·year−1. The Th VE also declined with increasing age, but at a slower rate (0.013 l·min−1·year−1). The τ′ $$\dot V$$ O2 was significantly increased across the age groups from 69 s for those aged 30-40 years to 98s for those aged 60 years or more. There was no evidence of accelerated decline in these aerobic parameters beyond age 60 years, and there were no differences in efficiency (27.5-29.9%) across age. Although other forcing functions should be used to confirm this characterization of the oxygen kinetics, this slowed response with age would result in greater oxygen deficit and possibly earlier fatigue in response to even light exercise in older individuals. Springer-Verlag, 1992 Oxygen kinetics nationallicence Maximum oxygen uptake nationallicence Ventilation threshold nationallicence Ageing nationallicence Babcock Mark Faculty of Kinesiology, University of Western Ontario, N6A 3K7, London, Ontario, Canada aut Paterson Donald Faculty of Kinesiology, University of Western Ontario, N6A 3K7, London, Ontario, Canada aut Cunningham David Faculty of Kinesiology, University of Western Ontario, N6A 3K7, London, Ontario, Canada aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/2(1992-03-01), 138-143 0301-5548 65:2<138 1992 65 421 https://doi.org/10.1007/BF00705071 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00705071 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Babcock Mark Faculty of Kinesiology, University of Western Ontario, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 700 1- Paterson Donald Faculty of Kinesiology, University of Western Ontario, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 700 1- Cunningham David Faculty of Kinesiology, University of Western Ontario, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/2(1992-03-01), 138-143 0301-5548 65:2<138 1992 65 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer