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A VO2max Protocol for Young, Apparently Healthy Adults.

Griffin K Green1, Whitley J Stone1, Danilo V Tolusso1

  • 1School of Kinesiology, Recreation & Sport, Western Kentucky University, Bowling Green, KY, USA.

International Journal of Exercise Science
|January 30, 2024
PubMed
Summary

A new treadmill protocol offers a valid and time-efficient method for measuring maximal oxygen consumption (VO2max) in healthy individuals. This novel approach minimizes muscular fatigue, ensuring more accurate VO2max assessments compared to traditional tests.

Keywords:
Treadmill testingaerobic endurancecardiorespiratory fitnessmaximal oxygen consumption

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Area of Science:

  • Exercise Physiology
  • Cardiorespiratory Fitness Assessment
  • Sports Science

Background:

  • Traditional treadmill protocols like Bruce and Astrand for assessing maximal oxygen consumption (VO2max) often employ steep grades.
  • Steep inclines can induce localized muscular fatigue, potentially leading to premature test termination before reaching true VO2max.
  • This limitation necessitates the development of alternative protocols better suited for specific populations, such as young, healthy individuals.

Purpose of the Study:

  • To evaluate a novel VO2max protocol designed to mitigate lower extremity fatigue.
  • To compare the validity and reliability of the novel protocol against established Bruce and Astrand protocols.
  • To determine if the novel protocol provides accurate VO2max measurements while potentially improving time efficiency.

Main Methods:

  • Fifteen healthy participants completed the Bruce, Astrand, and a novel treadmill protocol.
  • Key physiological variables including VO2max, maximal ventilation (VEmax), respiratory exchange ratio (RER), heart rate (HR), rating of perceived exertion (RPE), and time to exhaustion (TTE) were recorded.
  • Statistical analyses included Mean Absolute Percent Error (MAPE), Bland-Altman analysis, and paired samples t-tests to compare the protocols.

Main Results:

  • The novel protocol demonstrated substantial agreement and less than 10% MAPE with criterion protocols, confirming its validity for VO2max measurement.
  • Bland-Altman analysis showed low bias and tight limits of agreement for VO2max between the novel and traditional protocols.
  • While yielding similar VO2max values, the novel protocol resulted in significantly lower time to exhaustion (TTE) compared to Bruce and Astrand.

Conclusions:

  • The novel treadmill protocol is a valid method for assessing VO2max in young, healthy populations.
  • It effectively minimizes localized muscular fatigue compared to traditional steep-grade protocols.
  • The protocol offers a time-efficient alternative for VO2max testing, providing comparable results to established methods.