Physiological responses during cycle ergometry at a constant perception of effort

K. C. Cochrane, T. J. Housh, H. C. Bergstrom, N. D.M. Jenkins, G. Johnson, R. J. Schmidt, J. T. Cramer

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


13 subjects performed an incremental test to exhaustion, 4,8-min submaximal rides, and a 1-h ride at the rating of perceived exertion (RPE) that corresponded to the physical working capacity at the OMNI threshold (PWCOMNI) to examine: 1) the oxygen consumption (VO2), heart rate (HR), minute ventilation (+VE), respiratory frequency (FR), and power output responses during 1-h work bouts at a constant RPE that corresponded to the PWCOMNI; and 2) the ability of current models to explain the responses for physiological and perceptual parameters during the 1-h work bouts. The RPE that corresponded to the PWCOMNI represented a sustainable exercise intensity (56±5% (VO2Peak) within the moderate-intensity domain. The mean, normalized slope coefficients for the VO2, +VE, and power output vs. time relationships during the 1-h rides were significantly less than zero. The mean, normalized slope coefficient for the FR vs.time relationship during the 1-h rides, however, was not significantly different from zero. Thus, RPE most clearly tracked FR responses during the 1-h rides. It was hypothesized that afferent feedback from respiratory muscles may have mediated the perception of effort during cycle ergometry at a constant RPE in the moderate-intensity domain.

Original languageEnglish
Pages (from-to)466-473
Number of pages8
JournalInternational Journal of Sports Medicine
Issue number6
StatePublished - Feb 20 2015


  • RPE
  • aerobic evulation
  • exercise intensity
  • feedback models
  • power output

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation


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