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Association of strength, power, and physical performance with muscle mass and composition in older males: a comparison of muscle thickness, echo intensity, and lean tissue mass

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dc.contributor.authorParis, Michael
dc.contributor.authorBell, Kirsten Elizabeth
dc.contributor.authorAvrutin, Egor
dc.contributor.authorMourtzakis, Marina
dc.date.accessioned2023-05-10T15:36:47Z
dc.date.available2023-05-10T15:36:47Z
dc.date.issued2022-05
dc.descriptionThis is the Accepted Manuscript version of the paper; the version of record is published by Applied Physiology, Nutrition, and Metabolism and can be found here: https://doi.org/10.1139/apnm-2021-0690en
dc.description.abstractDual-energy X-ray absorptiometry (DXA) appendicular lean tissue is used to screen older adults for sarcopenia. However, emerging data indicates that ageing-related muscle atrophy largely occurs within specific muscles, which may be masked using appendicular lean tissue. Comparisons between appendicular lean tissue and site-specific measures of muscle in relation to strength and physical function are needed to advance our understanding of these features in the context of poor muscle function in aged adults. Our primary objective was to compare correlations between lean tissue and sitespecific muscle characteristics in relation to strength and physical function in older males. Older males (≥65 years) were evaluated for muscle strength, physical function (6-minute walk and 30-second sit-to-stand), and muscle size (appendicular and site-specific) and composition (echo intensity) using DXA and ultrasound. Of the 32 older males (75.467.9 years), 12 had low appendicular lean tissue. All DXA and ultrasound muscle characteristics were associated (r = 0.39 to 0.83, p < 0.05) with torque or power producing capabilities. Except for the knee flexors, no differences in correlation coefficients were observed between muscle thickness or regional lean tissue in relation to muscle strength. Neither DXA nor ultrasound muscle characteristics were associated with physical function. In older males, ultrasound-based muscle thickness and DXA lean tissue provided similar associations with strength.en
dc.identifier.urihttps://doi.org/10.1139/apnm-2021-0690
dc.identifier.urihttp://hdl.handle.net/10012/19438
dc.language.isoenen
dc.publisherCanadian Science Publishingen
dc.relation.ispartofseriesApplied Physiology Nutrition and Metabolism;
dc.subjectultrasounden
dc.subjectbody compositionen
dc.subjectdual energy X-ray absorptiometryen
dc.subjectagingen
dc.subjectskeletal muscleen
dc.subjectstrengthen
dc.titleAssociation of strength, power, and physical performance with muscle mass and composition in older males: a comparison of muscle thickness, echo intensity, and lean tissue massen
dc.typeArticleen
dcterms.bibliographicCitationParis, M. T., Bell, K. E., Avrutin, E., & Mourtzakis, M. (2022). Association of Strength, power, and function with muscle thickness, echo intensity, and lean tissue in older males. Applied Physiology, Nutrition, and Metabolism, 47(5), 521–528. https://doi.org/10.1139/apnm-2021-0690en
uws.contributor.affiliation1Faculty of Healthen
uws.contributor.affiliation2Kinesiology and Health Sciencesen
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.typeOfResourceTexten

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