The influence of speed, grade and mass during simulated off road bicycling.


Journal Article

The purpose of this investigation was to examine the effects of bicycle mass, speed, and grade on oxygen consumption (VO2), heart rate (HR), and ratings of perceived exertion (RPE) during a simulated off-road riding paradigm. Nine adult subjects with mean +/- SD age, mass, and VO2 max of 26.1 +/- 5.6 years, 71.7 +/- 7.5 kg, 56.6 +/- 5.2 ml x kg(-1) x min(-1) respectively, were trained to ride a fully suspended Trek Y-22 mountain bike on a treadmill with a 3.8 cm bump affixed to the belt. Riders completed a maximum of nine separate trials encompassing three different bike masses (11.6, 12.6 and 13.6 kg), 3 speeds (2.7, 3.6 and 4.5 m x s(-1)), and 3 grades (0, 2.5, and 5%). Throughout a trial, bike mass and speed remained constant while riding grade was increased every 5 min. During simulated off-road riding on a fully suspended mountain bike, increases in speed and grade significantly increased VO2, heart rate, and RPE. Increases in bike mass had no significant effects on VO2, heart rate or RPE. In addition, speed and grade changes interacted to differentially affect VO2, heart rate, and RPE at all speeds and grades.

Full Text

Duke Authors

Cited Authors

  • Berry, MJ; Koves, TR; Benedetto, JJ

Published Date

  • October 2000

Published In

Volume / Issue

  • 31 / 5

Start / End Page

  • 531 - 536

PubMed ID

  • 11059467

Pubmed Central ID

  • 11059467

International Standard Serial Number (ISSN)

  • 0003-6870

Digital Object Identifier (DOI)

  • 10.1016/s0003-6870(00)00022-3


  • eng

Conference Location

  • England