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Complex Interplay Between Determinants of Pacing and Performance During 20 km Cycle Time Trials

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Renfree, Andrew ORCID: https://orcid.org/0000-0001-9039-8574, West, Julia ORCID: https://orcid.org/0000-0001-9402-1301, Corbett, Mark, Rhoden, Clare and St Clair Gibson, Alan (2012) Complex Interplay Between Determinants of Pacing and Performance During 20 km Cycle Time Trials. International Journal of Sports Physiology and Performance, 7 (2). pp. 121-129. ISSN 1555-0265

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Official URL: http://journals.humankinetics.com/ijspp

Abstract

Purpose
This study examined the determinants of pacing strategy and performance during self paced maximal exercise.
Methods
Eight well trained cyclists completed two 20 km time trials. Power output, RPE, positive and negative affect, and iEMG activity of the active musculature were recorded every 0.5km, confidence in achieving pre-exercise goals was assessed every 5 km, and blood lactate and pH were measured post-exercise. Differences in all parameters were assessed between fastest (FAST) and slowest (SLOW) trials performed.
Results
Mean power output was significantly higher during the initial 90% of FAST, but not the final 10%, and blood lactate concentration was significantly higher and pH significantly lower following FAST. Mean iEMG activity was significantly higher throughout SLOW. RPE was similar throughout both trials, but participants had significantly more positive affect and less negative affect throughout FAST. Participants grew less confident in their ability to achieve their goals throughout SLOW.
Conclusions
The results suggest that affect may be the primary psychological regulator of pacing strategy and that higher levels of positivity and lower levels of negativity may have been associated with a more aggressive strategy during FAST. Although the exact mechanisms through which affect acts to influence performance are unclear, it may determine the degree of physiological disruption that can be tolerated, or be reflective of peripheral physiological status in relation to the still to be completed exercise task.

Item Type:	Article
Additional Information:	Staff and students at the University of Worcester can access the full-text via the UW online library search. External users should check availability with their local library or Interlibrary Requests Service.
Uncontrolled Discrete Keywords:	electromyography, affect, RPE, cycling
Subjects:	Q Science > QP Physiology
Divisions:	College of Business, Psychology and Sport > School of Sport and Exercise Science
Related URLs:	http://library.worc.ac.uk/resources/libr... http://journals.humankinetics.com/
Copyright Info:	Human Kinetics
Depositing User:	Andrew Renfree
Date Deposited:	20 Aug 2012 12:38
Last Modified:	23 Oct 2020 04:00
URI:	https://worc-9.eprints-hosting.org/id/eprint/1646

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