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Related Experiment Video

Updated: Feb 24, 2026

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Exercise tolerance during VO2max testing is a multifactorial psychobiological phenomenon.

Adrian W Midgley1, Keith Earle2, Lars R McNaughton1

  • 1a Department of Sport and Physical Activity , Edge Hill University , Ormskirk , UK.

Research in Sports Medicine (Print)
|August 22, 2017
PubMed
Summary

Men terminate maximal oxygen uptake tests due to leg fatigue and breathing discomfort, influenced by pulmonary function and leg strength. Perceived exercise reserve varied, with mixed views on verbal encouragement during testing.

Keywords:
Effortfatiguegoal settingmaximal oxygen uptakeverbal encouragement

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Area of Science:

  • Exercise Physiology
  • Sports Science

Background:

  • Maximal oxygen uptake (VO2max) testing is a standard measure of cardiorespiratory fitness.
  • Understanding factors influencing test termination is crucial for accurate assessment and participant safety.

Purpose of the Study:

  • To investigate the reasons for VO2max test termination in men.
  • To explore the relationship between test termination reasons and physiological factors.
  • To assess perceived exercise reserve and the impact of verbal encouragement.

Main Methods:

  • Fifty-nine men underwent a VO2max test and completed a questionnaire.
  • Reasons for test termination, perceived exercise reserve, and perception of verbal encouragement were recorded.
  • Statistical analysis examined predictors of common termination reasons.

Main Results:

  • Leg fatigue and breathing discomfort were the most common reasons for test termination.
  • These reasons were predicted by changes in pulmonary function and explosive leg strength (R²=0.40).
  • Median perceived exercise reserve was 45 seconds; two-thirds viewed verbal encouragement positively.

Conclusions:

  • Exercise tolerance during VO2max testing is multifactorial.
  • Physiological factors significantly influence perceived exertion and test termination.
  • Further research is warranted to explore these complex findings in exercise testing.