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Isometric knee extension test: A practical, repeatable, and suitable tool for lower-limb screening among institutionalized older adults

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dc.contributor.authorConesa Ros, Elena
dc.contributor.authorCourel Ibáñez, Javier
dc.contributor.authorHernández Belmonte, Alejandro
dc.contributor.authorMartínez Cava, Alejandro
dc.contributor.authorGarcía Conesa, Silverio
dc.contributor.authorBuendía Romero, Ángel
dc.contributor.authorFranco López, Francisco
dc.contributor.departmentActividad Física y Deporte
dc.date.accessioned2026-02-25T08:55:25Z
dc.date.available2026-02-25T08:55:25Z
dc.date.copyright© 2021 Elsevier Inc.
dc.date.issued2021-09-26
dc.description.abstractWe aimed to analyze the isometric knee extension test (IKE) test in terms of i) intra- and inter-session repeatability, and ii) relationship with functional and body composition factors of sarcopenia among institutionalized older adults. Thirteen institutionalized older adults (age = 87 ± 10 years, body mass [BM] = 73.1 ± 10.9 kg, body mass index [BMI] = 28.5 ± 3.8 kg·m2) were recruited from a nursing home. Variability of maximal isometric force registered in three IKE trials performed on the same day was used to examine intra-session repeatability, whereas inter-session repeatability was analyzed by comparing maximal isometric force from two different days. Furthermore, functional (Handgrip, 6-m Gait Speed, Time Up and Go [TUG], and Sit-to-stand tests) and body composition (appendicular lean mass adjusted by BMI, ALM/BMI) evaluations were conducted. Statistics included the intraclass correlation coefficient (ICC) and the standard error of measurement (SEM), expressed in both absolute (N·kg-1) and relative terms (coefficient of variation, CV = 100 × SEM / mean). High to very high intra-session repeatability was found for both the dominant and non-dominant legs (CV ≤ 6.0%, ICC ≥ 0.989). Similarly, both legs showed high inter-session repeatability (SEM ≤ 0.26 N·kg-1, ICC ≥ 0.959). On the other hand, significant relationships were found between Dominant and Non-dominant IKE tests and 6-m Gait Speed (r = 0.77; r = 0.58), ALM/BMI (r = 0.62; r = 0.58), and Non-dominant Handgrip/BM (r = 0.60; r = 0.68). In addition, a significant association was found between Dominant IKE/BM and TUG (r = -0.74), as well as between Non-dominant IKE/BM and Dominant Handgrip/BM (r = 0.67). These findings suggest that the IKE test is a repeatable and suitable strategy for lower-limb screening in institutionalized older adults.
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dc.format.extent6
dc.identifier.citationExperimental Gerontology, Volume 155, November 2021, 111575
dc.identifier.doihttps://doi.org/10.1016/j.exger.2021.111575
dc.identifier.issn0531-5565
dc.identifier.urihttp://hdl.handle.net/10201/212841
dc.languageeng
dc.publisherElsevier
dc.relationThis work was supported by the Autonomous Community of the Region of Murcia, Regional Program for the Promotion of Scientific and Technical Research (Action Plan 2018), Seneca Foundation-Agency of Science and Technology, Region of Murcia (ID: 20872/PI/18).
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0531556521003570
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectGeriatric
dc.subjectAging
dc.subjectFunctional capacity
dc.subjectLong term care
dc.subjectFrailty
dc.subject.odsObjetivo 3: Salud
dc.titleIsometric knee extension test: A practical, repeatable, and suitable tool for lower-limb screening among institutionalized older adults
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
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