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Pulmonary function during cycling and running in triathletes.

O Hue1, A Boussana, D Le Gallais

  • 1Laboratoire ACTE, UFR-STAPS, Antilles-Guyane, Pointe à Pitre Cedex, France. Hueo@wanadoo.fr

The Journal of Sports Medicine and Physical Fitness
|March 12, 2003
PubMed
Summary

Cycling exercise, not the run-bike transition, significantly alters triathletes' pulmonary volumes. This suggests cycling posture may impact respiratory function, affecting subsequent running performance.

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Respiratory Physiology

Background:

  • Running performance is crucial for triathletes, yet factors influencing post-cycle running remain unclear.
  • The perception of discomfort during the initial minutes of post-cycle running is not fully understood.
  • Pulmonary volumes are known to be impaired after cycle-run succession but not matched run-run succession.

Purpose of the Study:

  • To investigate the impact of cycling exercise on pulmonary volumes in triathletes.
  • To determine if cycling itself or the cycle-run transition affects respiratory function.
  • To explore potential mechanisms behind observed pulmonary volume changes.

Main Methods:

  • Thirteen young male triathletes underwent three trials: cycling-running (C-R), control cycling (C), and control running (R).

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  • Pulmonary volumes and flows were measured before and after each 30-minute cycling or 20-minute running trial.
  • Ventilatory data were collected continuously using an automated breath-by-breath system.

    • Main Results:

    • Control cycling (C) significantly increased residual volume (RV), functional residual capacity (FRC), and RV/TLC.
    • No significant changes in pulmonary volumes or flows were observed after the cycle-run (C-R) or control run (R) trials.
    • These findings indicate that cycling exercise itself, rather than the transition, influences pulmonary volumes.

    Conclusions:

    • Cycling exercise appears to induce post-exercise pulmonary volume changes, potentially leading to respiratory muscle alterations.
    • The characteristic crouched cycling position is proposed as a likely explanation for these respiratory effects.
    • Understanding these changes may help optimize triathlete training and performance.