Effect of age on 16.1km time trial performance.

Balmer, James, Bird, Stephen R, Davison, Richard and Lucia, Alejandro (2008) Effect of age on 16.1km time trial performance. Journal of Sports Sciences, 26 (2). pp. 197-206. ISSN 0264-0414

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In this study, we assessed the performance of trained senior (n = 6) and veteran (n = 6) cyclists (mean age 28 years, s = 3 and 57 years, s = 4 respectively). Each competitor completed two cycling tests, a ramped peak aerobic test and an indoor 16.1-km time-trial. The tests were performed using a Kingcycle™ ergometer with the cyclists riding their own bicycle fitted with an SRM™ powermeter. Power output, heart rate, and gas exchange variables were recorded continuously and blood lactate concentration [HLa] was assessed 3 min after the peak ramped test and at 2.5-min intervals during the time-trial. Peak values for power output (RMPmax), heart rate (HRpeak), oxygen uptake ([Vdot]O2peak), and ventilation ([Vdot]Epeak) attained during the ramped test were higher in the senior group (P < 0.05), whereas [HLa]peak, RERpeak, [Vdot]E:[Vdot]O2peak, and economypeak were similar between groups (P > 0.05). Time-trial values (mean for duration of race) for power output (WTT), heart rate (HRTT), [Vdot]O2 ([Vdot]O2TT), and [Vdot]E ([Vdot]ETT) were higher in the seniors (P < 0.05), but [HLa]TT, RERTT, [Vdot]ETT:[Vdot]O2TT, and economyTT were similar between the groups (P > 0.05). Time-trial exercise intensity, expressed as %RMPmax, %HRpeak, %[Vdot]O2peak, and %[Vdot]Epeak, was similar (P > 0.05) for seniors and veterans (WTT: 81%, s = 2 vs. 78%, s = 8; HRTT: 96%, s = 4 vs. 94%, s = 4; [Vdot]O2TT: 92%, s = 4 vs. 95%, s = 10; [Vdot]ETT: 89%, s = 8 vs. 85%, s = 8, respectively). Overall, seniors attained higher absolute values for power output, heart rate, [Vdot]O2, and [Vdot]E but not blood lactate concentration, respiratory exchange ratio (RER), [Vdot]E:[Vdot]O2, and economy. Veterans did not accommodate age-related declines in time trial performance by maintaining higher relative exercise intensity.

Item Type: Article
Print ISSN: 0264-0414
Electronic ISSN: 1466-447X
Uncontrolled Keywords: Ageing; Blood lactate concentration; Exercise intensity; Respiratory exchange ratio; Cycling time trials
University Divisions/Research Centres: Faculty of Health, Life & Social Sciences > School of Life Sciences
Dewey Decimal Subjects: 500 Science > 570 Life sciences; biology > 571 Physiology & related subjects
600 Technology > 610 Medicine & health > 612 Human physiology
Library of Congress Subjects: Q Science > QP Physiology
Item ID: 1633
Depositing User: RAE Import
Date Deposited: 03 Jun 2008 09:33
Last Modified: 11 Feb 2013 16:19

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