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Cycling efficiency and pedalling frequency in road cyclists.

J Chavarren1, J A Calbet

  • 1Departamento de Educación Física, Campus Universitario de Tafira, Universidad de Las Palmas de Gran Canaria, E-35017 Las Palmas de Gran Canaria, Canary Islands, Spain.

European Journal of Applied Physiology and Occupational Physiology
|October 29, 1999
PubMed
Summary

Lower pedalling rates improve cycling efficiency in road cyclists, with oxygen cost decreasing at 60 rpm. While gross efficiency worsens with higher cadences, delta efficiency increases, aiding prolonged high-power output.

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Area of Science:

  • Exercise Physiology
  • Sports Biomechanics

Background:

  • Optimizing pedalling rate is crucial for enhancing cycling performance and efficiency in athletes.
  • Understanding the physiological responses to varying cadences informs training strategies for competitive cyclists.

Purpose of the Study:

  • To investigate the impact of different pedalling rates on cycling efficiency in competitive road cyclists.
  • To determine the relationship between pedalling frequency, oxygen uptake, and gross and delta efficiency.

Main Methods:

  • Seven competitive road cyclists performed incremental exercise tests at four pedalling frequencies (60, 80, 100, 120 rpm).
  • Oxygen uptake (VO(2)) and carbon dioxide output (VCO(2)) were measured across six exercise intensities (54-93% VO(2max)).
  • Gross efficiency (GE) and delta efficiency (DE) were calculated and analyzed in relation to pedalling rate and power output.

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Main Results:

  • Oxygen cost of cycling was lowest at 60 rpm, with VO(2) showing a parabolic relationship with pedalling rate.
  • Gross efficiency (GE) decreased as pedalling rate increased but improved with higher exercise intensity.
  • Delta efficiency (DE) increased linearly with pedalling rate, while pulmonary ventilation was accentuated at the highest cadence.

Conclusions:

  • Lower pedalling rates (around 60 rpm) are more efficient in terms of oxygen cost for road cyclists.
  • While higher cadences reduce gross efficiency, they increase delta efficiency, potentially aiding sustained high power output.
  • These findings provide insights into optimal cadence selection for competitive cyclists during prolonged exercise.