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Body position affects performance in untrained cyclists.

M C Ashe1, G C Scroop, P I Frisken

  • 1University of British Columbia, Vancouver, BC, Canada. mashe@telus.net

British Journal of Sports Medicine
|September 30, 2003
PubMed
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For untrained cyclists, the upright cycling position allows for higher maximal oxygen uptake (VO2) and workload compared to the aero position. The upright stance also offers greater exercise economy during submaximal efforts.

Area of Science:

  • Exercise Physiology
  • Sports Biomechanics

Background:

  • Cycling performance is influenced by body positioning, with aerodynamic advantages of the aero position being well-established.
  • However, the physiological and biomechanical implications of different cycling positions, particularly for untrained individuals, require further investigation.

Purpose of the Study:

  • To compare cardiovascular and ventilatory responses between upright and aero cycle ergometry.
  • To assess these differences at both submaximal and maximal exercise intensities in untrained cyclists.

Main Methods:

  • Ten physically active, untrained male cyclists performed maximal exercise tests and steady-state cycling at 50, 100, and 150 W.
  • Cardiovascular (heart rate, oxygen uptake - VO2) and ventilatory (ventilation) variables were measured.

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Main Results:

  • The upright position yielded significantly higher maximal oxygen uptake (VO2), ventilation, heart rate, and workload capacity.
  • During submaximal steady-state cycling, VO2 and gross mechanical efficiency were significantly greater in the upright position.

Conclusions:

  • The upright cycling position facilitates greater maximal physiological outputs (VO2, ventilation, heart rate, workload) in untrained individuals.
  • Exercise may be more metabolically efficient in the upright position during steady-state cycling.
  • Untrained cyclists should consider the physiological benefits of the upright position against the aerodynamic gains of the aero position.