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Related Experiment Videos

Pulmonary O2 uptake on-kinetics in rowing and cycle ergometer exercise.

Claire L Roberts1, Daryl P Wilkerson, Andrew M Jones

  • 1Department of Exercise and Sport Science, Manchester Metropolitan University, Hassall Road, Alsager, ST & 2HL, UK.

Respiratory Physiology & Neurobiology
|March 16, 2005
PubMed
Summary

Rowing and cycling exercise show similar oxygen uptake (V(O2)) on-kinetics, challenging the hypothesis that greater muscle recruitment in rowing limits V(O2) response. Both activities demonstrate comparable Phase II V(O2) kinetics and slow component amplitude.

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Area of Science:

  • Exercise Physiology
  • Cardiopulmonary Function
  • Human Performance

Background:

  • Pulmonary oxygen uptake (V(O2)) on-kinetics reflect the dynamic adjustment of oxygen delivery and utilization during exercise.
  • Rowing ergometry recruits a larger muscle mass compared to cycling, potentially impacting muscle perfusion and V(O2) kinetics.

Purpose of the Study:

  • To characterize and compare pulmonary V(O2) on-kinetic responses between moderate and heavy intensity rowing and cycling exercise.
  • To test the hypothesis that greater muscle recruitment in rowing limits V(O2) kinetics compared to cycling.

Main Methods:

  • Eight healthy males performed step transitions to moderate and heavy intensity rowing and cycling exercise.
  • Pulmonary V(O2) was measured breath-by-breath, and V(O2) on-kinetics were analyzed using non-linear regression.

Related Experiment Videos

  • Key parameters analyzed included Phase II V(O2) kinetics and the V(O2) slow component amplitude.

    • Main Results:

    • No significant differences were found in the time constant of Phase II V(O2) kinetics between rowing and cycling for either moderate or heavy exercise.
    • The amplitude of the V(O2) slow component was also similar between the two exercise modes.
    • Oxygen uptake to work rate relationship (delta V(O2)/delta WR) was approximately 12% greater during rowing.

    Conclusions:

    • Pulmonary V(O2) on-kinetics are similar between rowing and cycling exercise, suggesting comparable muscle V(O2) adjustment rates.
    • The recruitment of a larger muscle mass in rowing does not appear to compromise muscle perfusion enough to slow V(O2) kinetics or increase the slow component.
    • These findings indicate that the mode of exercise, at least for non-specialized individuals, does not significantly alter the dynamic pulmonary V(O2) response.