Assessing the repeatability of expiratory flow limitation during incremental exercise in healthy adults.
expiratory flow limitation
repeatability
ventilatory capacity
ventilatory constraint
ventilatory demand
Journal
Physiological reports
ISSN: 2051-817X
Titre abrégé: Physiol Rep
Pays: United States
ID NLM: 101607800
Informations de publication
Date de publication:
Oct 2024
Oct 2024
Historique:
revised:
23
08
2024
received:
08
05
2024
accepted:
15
09
2024
medline:
3
10
2024
pubmed:
3
10
2024
entrez:
3
10
2024
Statut:
ppublish
Résumé
We sought to determine the repeatability of EFL in healthy adults during incremental cycle exercise. We hypothesized that the repeatability of EFL would be "strong" when assessed as a binary variable (i.e., absent or present) but "poor" when assessed as a continuous variable (i.e., % tidal volume overlap). Thirty-two healthy adults performed spirometry and an incremental cycle exercise test to exhaustion on two occasions. Standard cardiorespiratory variables were measured at rest and throughout exercise, and EFL was assessed by overlaying tidal expiratory flow-volume and maximal expiratory flow-volume curves. The repeatability of EFL was determined using Cohen's κ for binary assessments of EFL and intraclass correlation (ICC) for continuous measures of EFL. During exercise, n = 12 participants (38%) experienced EFL. At peak exercise, the repeatability of EFL was "minimal" (κ = 0.337, p = 0.145) when assessed as a binary variable and "poor" when measured as a continuous variable (ICC = 0.338, p = 0.025). At matched levels of minute ventilation during high-intensity exercise (i.e., >75% of peak oxygen uptake), the repeatability of EFL was "weak" when measured as a binary variable (κ = 0.474, p = 0.001) and "moderate" when measured as a continuous variable (ICC = 0.603, p < 0.001). Our results highlight the day-to-day variability associated with assessing EFL during exercise in healthy adults.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e70068Subventions
Organisme : Gouvernement du Canada | Natural Sciences and Engineering Research Council of Canada (NSERC)
ID : RGPIN-2020-06564
Organisme : Research Manitoba (RM)
ID : 5409
Informations de copyright
© 2024 The Author(s). Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society.
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