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

Green, S., Bishop, D. and Jenkins, D. (1995) Effect of end-point cadence on the maximal work-time relationship. European Journal of Applied Physiology and Occupational Physiology, 71 6: 559-561. doi:10.1007/BF00238561


Author Green, S.
Bishop, D.
Jenkins, D.
Title Effect of end-point cadence on the maximal work-time relationship
Journal name European Journal of Applied Physiology and Occupational Physiology   Check publisher's open access policy
ISSN 0301-5548
Publication date 1995-11
Sub-type Other
DOI 10.1007/BF00238561
Volume 71
Issue 6
Start page 559
End page 561
Total pages 3
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Formatted 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.
Keyword Anaerobic work capacity
Critical power
Electrically-braked ergometer
Methodology
Q-Index Code CX
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Other
Collection: School of Human Movement and Nutrition Sciences Publications
 
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Created: Wed, 09 Mar 2011, 08:49:55 EST