Effects of starting strategy on 5-min cycling time-trial performance

Aisbett, Brad, Le Rossignol, Peter, McConell, Glenn K., Abbiss, Chris R. and Snow, Rod 2009, Effects of starting strategy on 5-min cycling time-trial performance, Journal of sports sciences, vol. 27, no. 11, pp. 1201-1209.

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Title Effects of starting strategy on 5-min cycling time-trial performance
Author(s) Aisbett, Brad
Le Rossignol, Peter
McConell, Glenn K.
Abbiss, Chris R.
Snow, Rod
Journal name Journal of sports sciences
Volume number 27
Issue number 11
Start page 1201
End page 1209
Total pages 9
Publisher Routledge
Place of publication London, England
Publication date 2009-09
ISSN 0264-0414
1466-447X
Keyword(s) Pacing
High intensity
Metabolism
Aerobic
Anaerobic
Summary The importance of pacing for middle-distance performance is well recognized, yet previous research has produced equivocal results. Twenty-six trained male cyclists ( V O2peak 62.8+5.9 ml ·kg-1 · min-1· maximal aerobic power output 340+43 W; mean+s) performed three cycling time-trials where the total external work (102.7+13.7 kJ) for each trial was identical to the best of two 5-min habituation trials. Markers of aerobic and anaerobic metabolism were assessed in 12 participants. Power output during the first quarter of the time-trials was fixed to control external mechanical work done (25.7+3.4 kJ) and induce fast-, even-, and slow-starting strategies (60, 75, and 90 s, respectively). Finishing times for the fast-start time-trial (4:53+0:11 min:s) were shorter than for the even-start (5:04+0:11 min:s; 95% CI=5 to 18 s, effect size=0.65, P 50.001) and slow-start time-trial (5:09+0:11 min:s; 95% CI=7 to 24 s, effect size=1.00, P 50.001). Mean VO2 during the fast-start trials (4.31+0.51 litres · min-1) was 0.18+0.19 litres · min-1 (95% CI=0.07 to 0.30 litres · min-1, effect size=0.94, P =0.003) higher than the even- and 0.18+0.20 litres · min-1 (95% CI=0.5 to 0.30 litres · min-1, effect size=0.86, P =0.007) higher than the slow-start time-trial. Oxygen deficit was greatest during the first quarter of the fast-start trial but was lower than the even- and slow-start trials during the second quarter of the trial. Blood lactate and pH were similar between the three trials. In conclusion, performance during a 5-min cycling time-trial was improved with the adoption of a fast- rather than an even- or slow-starting strategy.
Language eng
Field of Research 110602 Exercise Physiology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, Routledge
Persistent URL http://hdl.handle.net/10536/DRO/DU:30028687

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