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Related Experiment Video

Updated: Feb 12, 2026

Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training
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Using ramp-incremental V̇O2 responses for constant-intensity exercise selection.

Daniel A Keir1,2,3, Donald H Paterson2,3, John M Kowalchuk2,3,4

  • 1a University Health Network, Department of Medicine, Toronto, Ontario, Canada.

Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme
|March 24, 2018
PubMed
Summary

The relationship between oxygen uptake (V̇O2) and exercise intensity differs between ramp and constant tests. Using ramp data to set constant exercise intensity can be inaccurate, impacting aerobic exercise prescription.

Keywords:
V̇O2 kineticsaerobicaérobiecinétique du V̇O2consommation d’oxygènecritical powerenduranceexercice d’intensité croissanteexercise intensityexercise prescriptionexercise thresholdsgraded exerciseintensité d’exerciceoxygen uptakeprescription d’exercicepuissance critiqueseuils aérobies

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Cardiorespiratory Fitness

Background:

  • A persistent view in exercise physiology is that oxygen uptake (V̇O2) increases linearly with exercise intensity.
  • This implies V̇O2 responses from ramp-incremental tests can predict those during constant-intensity exercise.

Purpose of the Study:

  • To review factors causing dissociation in V̇O2-intensity relationships between ramp and constant exercise paradigms.
  • To identify appropriate use of ramp V̇O2 data for assigning constant-intensity exercise.
  • To illustrate challenges in prescribing exercise solely from ramp-incremental tests.

Main Methods:

  • Review of exercise physiology literature.
  • Analysis of V̇O2 versus exercise intensity relationships.
  • Presentation of cycling V̇O2 data and kinetics modeling.

Main Results:

  • The V̇O2-intensity relationship differs between ramp-incremental and constant-intensity exercise.
  • Direct translation of V̇O2 responses from ramp to constant exercise is often inappropriate.
  • Challenges exist in using ramp data for precise constant-intensity exercise prescription.

Conclusions:

  • The linear framework for aerobic exercise prescription based on ramp tests is flawed.
  • Understanding the dissociation between exercise paradigms is crucial for accurate intensity assignment.
  • Solutions are proposed for improved individual-specific aerobic exercise prescription.