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Related Experiment Videos

A reproducible and variable intensity cycling performance protocol for warm conditions.

F E Marino1, D Kay, J Cannon

  • 1Human Performance Laboratory, Charles Sturt University, Bathurst New South Wales, Australia.

Journal of Science and Medicine in Sport
|August 22, 2002
PubMed
Summary

This study found a variable intensity cycling protocol is repeatable for cyclists of varying abilities in warm, humid conditions, especially after a familiarization trial. This suggests the protocol

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Environmental Physiology

Background:

  • Assessing the reproducibility of exercise protocols is crucial for reliable performance testing.
  • Variable intensity protocols are common in cycling but their reliability in adverse environmental conditions is less understood.

Purpose of the Study:

  • To evaluate the reproducibility of a 60-minute variable intensity cycling protocol with intermittent sprints.
  • To assess this protocol's reliability in warm and humid environmental conditions across a range of cyclist abilities.

Main Methods:

  • Eleven subjects with diverse abilities performed three 60-minute cycling trials (including six 1-minute sprints) separated by 5-14 days.
  • Trials were conducted in a controlled warm (33°C) and humid (63% RH) environment.

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  • Repeatability was analyzed using limits of agreement and coefficient of variation (CV) for distance cycled.

    • Main Results:

    • The coefficient of variation (CV) for distance cycled across three trials was 3.58%.
    • CV decreased from 3.54% (trials 1-2) to 1.34% (trials 2-3), indicating improved consistency.
    • Intra-class correlation was high (0.93), and distance cycled in trial 1 was significantly less than trials 2 and 3 (p<0.05).

    Conclusions:

    • The variable intensity cycling protocol demonstrates acceptable reproducibility for cyclists of varying abilities in warm, humid conditions, particularly with a familiarization trial.
    • Further research is needed to determine the applicability of protocols developed in moderate environments to less favorable conditions.
    • Understanding environmental influences is essential for accurately interpreting treatment effects in exercise studies.