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Perceptual responses in free vs. constant pace exercise.

M Garcin1, M Danel, V Billat

  • 1University Lille 2, FSSEP, Ronchin, France. murielle.garcin@univ-lille2.fr

International Journal of Sports Medicine
|November 16, 2007
PubMed
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Athletes running at a self-selected pace did not perceive the effort as less strenuous than a constant pace, despite achieving higher speeds and longer times to exhaustion. Performance improved with free pacing due to a final sprint.

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Human Performance

Background:

  • Understanding pacing strategies is crucial for optimizing athletic performance.
  • Previous research has explored the effects of different pacing strategies on physiological and perceptual responses during endurance exercise.

Purpose of the Study:

  • To investigate the influence of free versus constant pacing on perceived exertion (RPE) and estimated time to exhaustion (ETL).
  • To compare physiological responses, including oxygen uptake (VO2max) and velocity (vVO2max), between free and constant pace running.
  • To determine if self-paced exercise enhances endurance performance compared to a fixed pace.

Main Methods:

  • Ten athletes completed a graded exercise test to determine VO2max and vVO2max.
  • Participants performed constant pace and free pace runs to exhaustion at 90% vVO2max.

Related Experiment Videos

  • Physiological data (oxygen uptake, velocity) and perceptual data (RPE, ETL) were collected and analyzed.

    • Main Results:

    • No significant differences were found in RPE or ETL between free and constant pace runs.
    • Averaged oxygen uptake was similar between pacing conditions.
    • Free pacing resulted in significantly higher averaged vVO2max, % vVO2max, and time to exhaustion over the entire exercise duration compared to constant pacing.

    Conclusions:

    • While free pacing allows for increased performance, primarily due to a final sprint, it does not lead to a lower perceived exertion compared to constant pacing.
    • Athletes can sustain higher intensities and longer durations when allowed to self-regulate their pace, suggesting benefits for performance optimization.
    • The ability to sprint at the end of a free-paced run contributes to improved overall performance without altering the subjective feeling of effort.