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Int J Sports Med 2006; 27(12): 1005-1012
DOI: 10.1055/s-2006-923860
Training & Testing

© Georg Thieme Verlag KG Stuttgart · New York

Pulmonary O2 Uptake On-Kinetics in Endurance- and Sprint-Trained Master Athletes

N. J. A. Berger1 , J. Rittweger1 , A. Kwiet2 , I. Michaelis2 , A. G. Williams1 , K. Tolfrey1 , A. M. Jones1
  • 1Department of Exercise and Sport Science, Manchester Metropolitan University, Alsager, United Kingdom
  • 2Zentrum für Muskel- und Knochenforschung, Charité - Universitätsmedizin Berlin, Berlin, Germany
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Publikationsverlauf

Accepted after revision: December 5, 2005

Publikationsdatum:
11. April 2006 (online)

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Abstract

The purpose of this study was to characterise the V·O2 kinetic response to moderate intensity cycle exercise in endurance-trained (END) and sprint or power-trained (SPR) track and field master athletes ranging in age from 45 to 85 years. We hypothesised that the time constant (τ) describing the Phase II V·O2 on-response would be smaller in the END compared to the SPR athletes, and that the τ would become greater with increasing age in both groups. Eighty-four master athletes who were competing at either the British or European Veteran Athletics Championships acted as subjects, and were classified as either END (800 m - marathon; n = 41), or SPR (100 - 400 m and field events; n = 43) specialists. Subjects completed two 6 minute “step” transitions to a work rate of moderate intensity on a cycle ergometer and pulmonary gas exchange was measured breath-by-breath. Analysis of variance revealed that SPR athletes had slower V·O2 on-kinetics (i.e., greater τ) compared to END athletes at each of the age groups studied: 46 - 55 yrs (END: 25 ± 6 vs. SPR: 36 ± 9 s; p < 0.10), 56 - 65 yrs (END: 25 ± 5 vs. SPR: 35 ± 10 s; p < 0.05), 66 - 75 yrs (END: 29 ± 10 vs. SPR: 40 ± 13 s; p < 0.05), and 76 - 85 yrs (END: 31 ± 10 vs. SPR: 51 ± 18 s; p < 0.05). The V·O2 on-kinetics became slower with advancing age in the SPR athletes (p < 0.05 between 56 - 65 and 76 - 85 yrs) but were not significantly changed in the END athletes. The slower V·O2 on-kinetics in SPR compared to END master athletes is consistent both with differences in physiology (e.g., muscle fibre type, oxidative/glycolytic capacity) and training between these specialist athletes. Master END athletes have similar τ values to their younger counterparts (∼ 25 s) suggesting that participation in endurance exercise training limits the slowing of V·O2 on-kinetics with age in this population.

Key words

Ageing - aerobic fitness - efficiency - O2 deficit

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Professor PhD A. M. Jones

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