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Pacing Strategies and Metabolic Responses During 4-Minute Running Time-Trials
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.ORCID iD: 0000-0003-4433-1218
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
2017 (English)In: International Journal of Sports Physiology and Performance, ISSN 1555-0265, E-ISSN 1555-0273, Vol. 17, 1-24 p.Article in journal (Refereed) Epub ahead of print
Abstract [en]

Purpose: The aim of the current study was to investigate pacing strategies and the distributionof physiological resources in best versus worst performances during a series of 4-minute, self-paced running time-trials (RunTTs). Methods: Five male and five female recreational runners(age 32 ± 7 years) completed a sub-maximal ramp test and five RunTTs on a motor-driventreadmill fitted with a speed-controlling laser system. The supramaximal V̇ O2 demand wasestimated by linear extrapolation from the sub-maximal relationship between V̇ O2 and speed,enabling computation of the accumulated oxygen deficit (AOD). Results: There were nosignificant differences between the five RunTTs for any of the performance, physiological orsubjective responses (P > 0.05). The trial-to-trial variability in pacing (i.e., separate quarters)was typically low, with an average within-athlete CV of 3.3%, being highest at the start andend of the 4 minutes. Total distance covered and distance covered over the first and last 2minutes for best and worst performances were 1137 ± 94 and 1090 ± 89 m (P < 0.001), 565 ±53 and 526 ± 40 m (P = 0.002), and 572 ± 47 and 565 ± 54 m (P = 0.346), respectively.Conclusions: Negative pacing strategies were evident during both the best and worstperformances of the RunTT. Best performances were characterised by more aggressive pacingover the first 2 minutes compared with worst performances. In addition, the relatively low trial-to-trial variability in running speed suggests that pacing strategies are similar during a seriesof 4-minute, self-paced running time-trials.

Place, publisher, year, edition, pages
2017. Vol. 17, 1-24 p.
Keyword [en]
accumulated oxygen deficit; negative pacing; oxygen uptake; performance; self-pacing
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-30361DOI: 10.1123/ijspp.2016-0341OAI: oai:DiVA.org:miun-30361DiVA: diva2:1077598
Available from: 2017-02-28 Created: 2017-02-28 Last updated: 2017-02-28Bibliographically approved

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Watkins, JonathanPlatt, SimonAndersson, ErikMcGawley, Kerry
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CiteExportLink to record
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Citation style
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