Analysis of Individual ˙O2max Responses during a Cardiopulmonary Exercise Test and the Verification Phase in Physically Active Women

Pasquale J. Succi, Brian Benitez, Minyoung Kwak, Haley C. Bergstrom

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This study aimed to investigate the test–retest reliability, mean, and individual responses in the measurement of maximal oxygen consumption ( (Formula presented.) O2max) during a cardiopulmonary exercise test (CPET) and the verification phase during cycle ergometry in women. Nine women (22 ± 2 yrs, 166.0 ± 4.5 cm, 58.6 ± 7.7 kg) completed a CPET, passively rested for 5 min, and then completed a verification phase at 90% of peak power output to determine the highest (Formula presented.) O2 from the CPET ( (Formula presented.) O2CPET) and verification phase ( (Formula presented.) O2verification) on 2 separate days. Analyses included a two-way repeated measures ANOVA, intraclass correlation coefficients (ICC2,1), standard errors of the measurement (SEM), minimal differences (MD), and coefficients of variation (CoV). There was no test (test 1 versus test 2) × method (CPET vs. verification phase) interaction (p = 0.896) and no main effect for method (p = 0.459). However, test 1 (39.2 mL·kg−1·min−1) was significantly higher than test 2 (38.3 mL·kg−1·min−1) (p = 0.043). The (Formula presented.) O2CPET (ICC = 0.984; CoV = 1.98%; SEM = 0.77 mL·kg−1·min−1; MD = 2.14 mL·kg−1·min−1) and (Formula presented.) O2verification (ICC = 0.964; CoV = 3.30%; SEM = 1.27 mL·kg−1·min−1; MD = 3.52 mL·kg−1·min−1) demonstrated “excellent” reliability. Two subjects demonstrated a test 1 (Formula presented.) O2CPET that exceeded the test 2 (Formula presented.) O2CPET, and one subject demonstrated a test 1 (Formula presented.) O2verification that exceeded the test 2 (Formula presented.) O2verification by more than the respective CPET and verification phase MD. One subject demonstrated a (Formula presented.) O2CPET that exceeded the (Formula presented.) O2verification, and one subject demonstrated a (Formula presented.) O2verification that exceeded the (Formula presented.) O2CPET by more than the MD. These results demonstrate the importance of examining the individual responses in the measurement of the (Formula presented.) O2max and suggest that the MD may be a useful threshold to quantify real individual changes in (Formula presented.) O2.

Original languageEnglish
Article number124
JournalJournal of Functional Morphology and Kinesiology
Volume8
Issue number3
DOIs
StatePublished - Sep 2023

Bibliographical note

Publisher Copyright:
© 2023 by the authors.

Keywords

  • exercise test
  • oxygen consumption
  • verification phase
  • women

ASJC Scopus subject areas

  • Anatomy
  • Rheumatology
  • Histology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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