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Effect of end-point cadence on the maximal work-time relationship

Green, S, Bishop, David and Jenkins, David G (1995) Effect of end-point cadence on the maximal work-time relationship. European Journal of Applied Physiology and Occupational Physiology , 71 (6). pp. 559-561. ISSN 0301-5548 (print) 1439-6327 (online)

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Abstract

This study examined the effect of end-point cadence on the parameters of the work-time relationship determined for cycle ergometry. Eight male subjects completed four maximal tests on an electrically-braked cycle ergometer that regulated a constant power output independent of cadence. The power outputs imposed ranged between an average of 259 W and 403 W, whereas the corresponding durations ranged between 139 s and 1691 s. During each test subjects were required to maintain a cadence of 80–90 rpm. Accumulated time to end-point cadences of 70, 60 and 50 rpm were recorded. The four work-time determinations for each of three end-point cadences were used to determine linear relationships between work and time, yielding both a y-intercept, which represents anaerobic work capacity, and a slope, which is termed critical power (CP), for each end-point cadence. There was a significant increase in the y-intercept as end-point cadence decreased from 70 to 60 rpm (F[1,7]=36.7, p < 0.001) or 70 to 50 rpm (F[1,7]=80.1, p < 0.001), but not from 60 rpm to 50 rpm (F[1,7]=3.28, p > 0.05). In contrast, there was no effect of end-point cadence on CP (F[2,14]=1.89, p < 0.05). These results demonstrate that the end-point cadence selected to terminate tests only affects the y-intercept of the work-time relationship. To control for this effect, the cadence at which each test is terminated should be standardised if determination of anaerobic work capacity, as represented by the y-intercept, is required.

Item Type: Article
Uncontrolled Keywords: critical power, anaerobic work capacity, methodology, electrically-braked ergometer
Subjects: FOR Classification > 1106 Human Movement and Sports Science
Faculty/School/Research Centre/Department > College of Sports and Exercise Science
Depositing User: VUIR
Date Deposited: 20 Jan 2014 05:51
Last Modified: 02 Feb 2014 03:57
URI: http://vuir.vu.edu.au/id/eprint/24278
DOI: https://doi.org/10.1007/BF00238561
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Citations in Scopus: 5 - View on Scopus

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