Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults
8 affiliations
- 1Núcleo de Investigación en Salud, Actividad Física y Deporte ISAFYD, Universidad de Las Américas, Viña del Mar, Chile
- 2Escuela de Ciencias de la Actividad Física, el Deporte y la Salud, Universidad de Santiago de Chile (USACH), Santiago, Chile
- 3Facultad de Educación y Ciencias Sociales, Universidad Andres Bello, Viña del Mar, Chile
- 4Laboratorio 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
- 5Departamento Medicina Interna, Universidad de Valparaíso, Viña del Mar, Chile
- 6Facultad de Ciencias, Escuela de Nutrición y Dietética, Universidad Mayor, Santiago, Chile
- 7Facultad de Salud y Ciencias Sociales, Universidad de Las Américas, Providencia, Chile
- 8Programa de Pós-Graduação em Enfermagem e Biociências (PPgEnfBio), Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Rio de Janeiro, Brazil
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.
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BibTeX
@article{ojeda2026association,
title = {{Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults}},
author = {Álvaro Huerta Ojeda and Emilio Jofré-Saldía and Guillermo Barahona-Fuentes and Sergio Galdames Maliqueo and Maximiliano Bravo Yapur and Regina de Villa Garduño and Carlos Jorquera-Aguilera and María-Mercedes Yeomans-Cabrera and Estélio H. M. Dantas},
journal = {PLOS One},
year = {2026},
month = oct,
doi = {10.1371/journal.pone.0359858},
url = {https://doi.org/10.1371/journal.pone.0359858},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults
AU - Álvaro Huerta Ojeda
AU - Emilio Jofré-Saldía
AU - Guillermo Barahona-Fuentes
AU - Sergio Galdames Maliqueo
AU - Maximiliano Bravo Yapur
AU - Regina de Villa Garduño
AU - Carlos Jorquera-Aguilera
AU - María-Mercedes Yeomans-Cabrera
AU - Estélio H. M. Dantas
PY - 2026
DA - 2026/10/05
JO - PLOS One
DO - 10.1371/journal.pone.0359858
UR - https://doi.org/10.1371/journal.pone.0359858
AB - 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.
SN - 1932-6203
ER -