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Classification of moderate-intensity overground walking speed in 21-to 85-year-old adults

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dc.contributor.authorZheng, Peixuan
dc.contributor.authorDucharme, Scott W.
dc.contributor.authorMoore, Christopher C.
dc.contributor.authorTudor-Locke, Catrine
dc.contributor.authorAguiar, Elroy J.
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherCalifornia State University Long Beach
dc.contributor.otherUniversity of North Carolina
dc.contributor.otherUniversity of North Carolina Chapel Hill
dc.contributor.otherUniversity of North Carolina Charlotte
dc.date.accessioned2023-09-28T19:38:03Z
dc.date.available2023-09-28T19:38:03Z
dc.date.issued2022
dc.description.abstractThe Compendium of Physical Activities reports that walking at 2.5 mph associates with absolutely-defined moderate intensity (i.e., >= 3 metabolic equivalents [METs]). However, it is unclear whether this speed threshold is accurate during overground walking and/or across the adult age-span. This study aimed to identify optimal and heuristic speed thresholds associated with 3 METs during overground walking across age groups. Healthy adults (n = 248, 21-85 years old, 49% women) performed a 5-minute self-paced overground walking trial. Speed was measured using an electronic gait mat, and oxygen uptake was measured using indirect calorimetry and converted to METs. Optimal and heuristic thresholds and classification accuracy metrics were determined and compared using ROC curve analyses. Speed thresholds (95% CIs) associated with 3 METs for the whole sample, young (21-40 years), middle-aged (41-60 years) and older-aged (61-85 years) groups were 1.29 (1.25, 1.33), 1.30 (1,26, 1,35), and 1.25 (1.21, 1.29) m/s, respectively. Overall, 3 mph and 5 km/h performed better than 2.5 mph and 4.5 km/h in balancing both sensitivity and specificity (higher Youden's Indices). Overground walking speeds associated with 3 METs were similar across age groups. A heuristic threshold of 3 mph or 5 km/h may better identify absolutely-defined moderate intensity overground walking.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.citationZheng, P., Ducharme, S. W., Moore, C. C., Tudor-Locke, C., & Aguiar, E. J. (2022). Classification of moderate-intensity overground walking speed in 21- to 85-year-old adults. In Journal of Sports Sciences (Vol. 40, Issue 15, pp. 1732–1740). Informa UK Limited. https://doi.org/10.1080/02640414.2022.2103622
dc.identifier.doi10.1080/02640414.2022.2103622
dc.identifier.orcidhttps://orcid.org/0000-0003-4763-0491
dc.identifier.orcidhttps://orcid.org/0000-0002-0781-4459
dc.identifier.urihttps://ir.ua.edu/handle/123456789/11620
dc.languageEnglish
dc.language.isoen_US
dc.publisherTaylor & Francis
dc.subjectWalking speed
dc.subjectmoderate intensity
dc.subjectphysical activity
dc.subjectENERGY-EXPENDITURE
dc.subjectOLDER-ADULTS
dc.subjectCOST
dc.subjectPARAMETERS
dc.subjectTREADMILL
dc.subjectRATIO
dc.subjectWOMEN
dc.subjectWORK
dc.subjectSport Sciences
dc.titleClassification of moderate-intensity overground walking speed in 21-to 85-year-old adultsen_US
dc.typeArticle
dc.typetext

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