Effect of the Rotor crank system on cycling performance

Simon A. Jobson, James Hopker, Andrew Galbraith, Damian A. Coleman, Alan M. Nevill

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

The aim of this study was to evaluate the impact of a novel crank system on laboratory time-trial cycling performance. The Rotor system makes each pedal independent from the other so that the cranks are no longer fixed at 180°. Twelve male competitive but non-elite cyclists (mean ± s: 35 ± 7 yr, Wmax = 363 ± 38 W, VO2peak = 4.5 ± 0.3 L·min-1) completed 6-weeks of their normal training using either a conventional (CON) or the novel Rotor (ROT) pedal system. All participants then completed two 40.23-km time-trials on an air-braked ergometer, one using CON and one using ROT. Mean performance speeds were not different between trials (CON = 41.7 km·h-1 vs. ROT = 41.6 km·h-1, P > 0.05). Indeed, the pedal system used during the time-trials had no impact on any of the measured variables (power output, cadence, heart rate, VO2, RER, gross efficiency). Furthermore, the ANOVA identified no significant interaction effect between main effects (Time-trial crank system*Training crank system, P > 0.05). To the authors' knowledge, this is the first study to examine the effects of the Rotor system on endurance performance rather than endurance capacity. These results suggest that the Rotor system has no measurable impact on time-trial performance. However, further studies should examine the importance of the Rotor 'regulation point' and the suggestion that the Rotor system has acute ergogenic effects if used infrequently.

Original languageEnglish
Pages (from-to)463-467
Number of pages5
JournalJournal of Sports Science and Medicine
Volume8
Issue number3
Publication statusPublished - 1 Sep 2009
Externally publishedYes

Keywords

  • Bicycle equipment
  • Cycling performance
  • Gross efficiency

Cite this

Jobson, S. A., Hopker, J., Galbraith, A., Coleman, D. A., & Nevill, A. M. (2009). Effect of the Rotor crank system on cycling performance. 8(3), 463-467.
Jobson, Simon A. ; Hopker, James ; Galbraith, Andrew ; Coleman, Damian A. ; Nevill, Alan M. / Effect of the Rotor crank system on cycling performance. 2009 ; Vol. 8, No. 3. pp. 463-467.
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Jobson, SA, Hopker, J, Galbraith, A, Coleman, DA & Nevill, AM 2009, 'Effect of the Rotor crank system on cycling performance' vol. 8, no. 3, pp. 463-467.

Effect of the Rotor crank system on cycling performance. / Jobson, Simon A.; Hopker, James; Galbraith, Andrew; Coleman, Damian A.; Nevill, Alan M.

Vol. 8, No. 3, 01.09.2009, p. 463-467.

Research output: Contribution to journalArticleResearchpeer-review

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Jobson SA, Hopker J, Galbraith A, Coleman DA, Nevill AM. Effect of the Rotor crank system on cycling performance. 2009 Sep 1;8(3):463-467.