{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T17:56:07Z","timestamp":1791222967512,"version":"4.1.0"},"reference-count":60,"publisher":"Public Library of Science (PLoS)","issue":"10","license":[{"start":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T00:00:00Z","timestamp":1791158400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>\n                    Both muscle strength and muscle quality are essential factors for preserving autonomy and functionality in older adults (OA). However, the relationship between muscle quality index (MQI) and the time to stand up from the prone position (SPP) in this population is unknown. The primary purpose of this study was to determine the relationship between MQI and SPP completion time in community-dwelling OA capable of performing the test, considering age, sex, stature, and fat mass percentage. This cross-sectional study included 376 OA (70.47\u2009\u00b1\u20096.95 years; 234 women and 142 men). Functional Autonomy (FA) was assessed using the GDLAM protocol, and MQI was calculated as manual grip strength divided by body mass index (N\/BMI). Pearson's test was used to correlate parametric data, while Spearman's was used for non-parametric data. For both the dominant (D) and non-dominant (N-D) limbs, the analysis showed a high correlation between MQI and time in the SPP test (D:\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009\u22120.55, 95% CI \u22120.62 to \u22120.48,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.0001; N-D:\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u2009\u22120.57, 95% CI \u22120.64 to \u22120.50,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.0001). This association remained significant in all four regression models after adjustment (all\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.001), with models based on body mass showing greater explanatory power than those based on body mass index (adjusted R\u00b2 0.351\u20130.366 vs. 0.343\u20130.360). These results indicate that higher MQI is associated with shorter SPP completion time in community-dwelling OA. Therefore, the SPP test shows potential as a practical, field-based indicator associated with FA in this population.\n                  <\/jats:p>","DOI":"10.1371\/journal.pone.0359858","type":"journal-article","created":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T17:28:43Z","timestamp":1791221323000},"page":"e0359858","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults"],"prefix":"10.1371","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6871-098X","authenticated-orcid":true,"given":"\u00c1lvaro","family":"Huerta Ojeda","sequence":"first","affiliation":[{"name":"N\u00facleo de Investigaci\u00f3n en Salud, Actividad F\u00edsica y Deporte ISAFYD, Universidad de Las Am\u00e9ricas","place":["Vi\u00f1a del Mar, Chile"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emilio","family":"Jofr\u00e9-Sald\u00eda","sequence":"additional","affiliation":[{"name":"Escuela de Ciencias de la Actividad F\u00edsica, el Deporte y la Salud, Universidad de Santiago de Chile (USACH)","place":["Santiago, Chile"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guillermo","family":"Barahona-Fuentes","sequence":"additional","affiliation":[{"name":"Universidad Andres Bello","place":["Vi\u00f1a del Mar, Chile"],"department":["Facultad de Educaci\u00f3n y Ciencias Sociales"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sergio","family":"Galdames Maliqueo","sequence":"additional","affiliation":[{"name":"Universidad de Playa Ancha de Ciencias de la Educaci\u00f3n","place":["Valpara\u00edso, Chile"],"department":["Laboratorio de An\u00e1lisis de la Actividad F\u00edsica y del Deporte, Facultad de Ciencias de la Actividad F\u00edsica y del Deporte"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maximiliano","family":"Bravo Yapur","sequence":"additional","affiliation":[{"name":"Universidad de Valpara\u00edso","place":["Vi\u00f1a del Mar, Chile"],"department":["Departamento Medicina Interna"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Regina","family":"de Villa Gardu\u00f1o","sequence":"additional","affiliation":[{"name":"N\u00facleo de Investigaci\u00f3n en Salud, Actividad F\u00edsica y Deporte ISAFYD, Universidad de Las Am\u00e9ricas","place":["Vi\u00f1a del Mar, Chile"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Jorquera-Aguilera","sequence":"additional","affiliation":[{"name":"Escuela de Nutrici\u00f3n y Diet\u00e9tica, Universidad Mayor","place":["Santiago, Chile"],"department":["Facultad de Ciencias"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mar\u00eda-Mercedes","family":"Yeomans-Cabrera","sequence":"additional","affiliation":[{"name":"Universidad de Las Am\u00e9ricas","place":["Providencia, Chile"],"department":["Facultad de Salud y Ciencias Sociales"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Est\u00e9lio H. M.","family":"Dantas","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s-Gradua\u00e7\u00e3o em Enfermagem e Bioci\u00eancias (PPgEnfBio), Universidade Federal do Estado do Rio de Janeiro (UNIRIO)","place":["Rio de Janeiro, Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2026,10,5]]},"reference":[{"key":"pone.0359858.ref001","volume-title":"Documento de trabajo, envejecimiento en Chile: evoluci\u00f3n, caracter\u00edsticas de las personas mayores y desaf\u00edos demogr\u00e1ficos para la poblaci\u00f3n","author":"H Rojas F","year":"2022"},{"key":"pone.0359858.ref002","doi-asserted-by":"crossref","first-page":"1418","DOI":"10.4067\/S0034-98872020001001418","article-title":"Prevalencia de fragilidad en personas mayores de Chile: resultados de la Encuesta Nacional de Salud 2016-2017","volume":"148","author":"C Troncoso-Pantoja","year":"2020","journal-title":"Rev Med 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