{
  "abstract": "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 ± 6.95 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: r = −0.55, 95% CI −0.62 to −0.48, p < 0.0001; N-D: r = −0.57, 95% CI −0.64 to −0.50, p < 0.0001). This association remained significant in all four regression models after adjustment (all p < 0.001), with models based on body mass showing greater explanatory power than those based on body mass index (adjusted R² 0.351–0.366 vs. 0.343–0.360). 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.",
  "abstract_shown": true,
  "affiliations": [
    "Núcleo de Investigación en Salud, Actividad Física y Deporte ISAFYD, Universidad de Las Américas, Viña del Mar, Chile",
    "Escuela de Ciencias de la Actividad Física, el Deporte y la Salud, Universidad de Santiago de Chile (USACH), Santiago, Chile",
    "Facultad de Educación y Ciencias Sociales, Universidad Andres Bello, Viña del Mar, Chile",
    "Laboratorio de Análisis de la Actividad Física y del Deporte, Facultad de Ciencias de la Actividad Física y del Deporte, Universidad de Playa Ancha de Ciencias de la Educación, Valparaíso, Chile",
    "Departamento Medicina Interna, Universidad de Valparaíso, Viña del Mar, Chile",
    "Facultad de Ciencias, Escuela de Nutrición y Dietética, Universidad Mayor, Santiago, Chile",
    "Facultad de Salud y Ciencias Sociales, Universidad de Las Américas, Providencia, Chile",
    "Programa de Pós-Graduação em Enfermagem e Biociências (PPgEnfBio), Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Rio de Janeiro, Brazil"
  ],
  "article_type": "Research Article",
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Álvaro Huerta Ojeda"
    },
    {
      "affs": [
        1
      ],
      "name": "Emilio Jofré-Saldía"
    },
    {
      "affs": [
        2
      ],
      "name": "Guillermo Barahona-Fuentes"
    },
    {
      "affs": [
        3
      ],
      "name": "Sergio Galdames Maliqueo"
    },
    {
      "affs": [
        4
      ],
      "name": "Maximiliano Bravo Yapur"
    },
    {
      "affs": [
        5
      ],
      "name": "Regina de Villa Garduño"
    },
    {
      "affs": [
        6
      ],
      "name": "Carlos Jorquera-Aguilera"
    },
    {
      "affs": [
        7
      ],
      "name": "María-Mercedes Yeomans-Cabrera"
    },
    {
      "name": "Estélio H. M. Dantas"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/89egnzgfhrpjr.bib",
  "cited_by": 0,
  "doi": "10.1371/journal.pone.0359858",
  "fulltext_url": null,
  "id": "89egnzgfhrpjr",
  "issns": [
    "1932-6203"
  ],
  "landing_url": "https://doi.org/10.1371/journal.pone.0359858",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2737|Nutrition and Health in Aging"
    ],
    [
      "plos",
      "/Biology and life sciences/Anatomy/Biological tissue/Connective tissue/Adipose tissue"
    ],
    [
      "plos",
      "/Biology and life sciences/Anatomy/Body limbs"
    ],
    [
      "plos",
      "/Biology and life sciences/Biochemistry/Lipids/Fats"
    ],
    [
      "plos",
      "/Biology and life sciences/Biomechanics/Hand strength"
    ],
    [
      "plos",
      "/Biology and life sciences/Physiology/Muscle physiology/Muscle functions"
    ],
    [
      "plos",
      "/Medicine and health sciences/Anatomy/Biological tissue/Connective tissue/Adipose tissue"
    ],
    [
      "plos",
      "/Medicine and health sciences/Anatomy/Body limbs"
    ],
    [
      "plos",
      "/People and places/Population groupings/Age groups/Adults/Elderly"
    ],
    [
      "plos",
      "/Research and analysis methods/Bioassays and physiological analysis/Electrophysiological techniques/Cardiac electrophysiology/Electrocardiography"
    ],
    [
      "plos",
      "/Research and analysis methods/Bioassays and physiological analysis/Muscle analysis"
    ]
  ],
  "openalex": "W7220378883",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": "Public Library of Science",
  "ris": "https://research.draconitic.com/paper/89egnzgfhrpjr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "10.1371/journal.pone.0359858",
      "source": "plos",
      "url": "https://doi.org/10.1371/journal.pone.0359858"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "plos:anatomy",
      "subfield": "physiology"
    }
  ],
  "title": "Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults",
  "title_text": "Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:37Z",
  "url": "https://research.draconitic.com/paper/89egnzgfhrpjr",
  "venue": "PLOS One",
  "versions": []
}