@misc{10481/61491,
year = {2019},
month = {8},
url = {http://hdl.handle.net/10481/61491},
abstract = {Background. Older adults with hip osteoarthritis (OA) suffer a progressive loss of
muscle quality and strength, affecting their daily activities and quality of life. The
purpose of this study is to compare the levels of isometric strength among older adults
with and without hip OA and healthy young adults, and to determine the relationship
between muscle quality index (MQI) and isometric strength.
Methods. Fourteen subjects with hip OA (65.6 +/- 3.0 years), 18 healthy older adults
(66.6+/-6.5 years) and 32 young adults (20.7+/-2.0 years) participated in the study. MQI,
isometric muscle strength of the hip, ten time sit-to-stand tests, and body composition
were measured.
Results. The MQI was lower in subjects with hip OA, with no significant differences
between groups (p > 0:054). Subjects with OA produced significantly less isometric
strength in hip extension (p < 0:001), flexion (p < 0:001), abduction (p < 0:05),
adduction (p < 0:001), external (p < 0:05) and internal rotation (p < 0:05). Subjects
with OA demonstrated longer time in the execution of the sit-to-stand test (p<0:001)
in comparison with healthy older and young adults. High correlations between MQI, sitto-
stand (r = -0:76, p<0:01) and peak force during hip abduction (r =0:78, p<0:01)
where found in subjects with OA. Moderate correlation between MQI and peak force
during hip flexion (r =0:55, p<0:05) and external rotation (r =0:61, p<0:05) were
found in the OA group.
Conclusions. Subjects with OA have lower MQI than old and young healthy controls.
In subjects with OA, there was a significant relationship between isometric strength of
hip muscles and performance on the sit-to-stand test and the MQI.},
organization = {This work was supported by University Andrés Bello, NoDI-7-17/CBC.},
publisher = {PeerJ},
keywords = {Muscle quality},
keywords = {Hip},
keywords = {Osteoarthritis},
keywords = {Strength},
keywords = {Isometric exercise},
title = {Muscle quality index and isometric strength in older adults with hip osteoarthritis},
doi = {10.7717/peerj.7471},
author = {Jerez Mayorga, Daniel Alejandro and Chirosa Ríos, Luis Javier and Reyes, Álvaro and Delgado Floody, Pedro and Machado Payer, Ramón and Guisado Requena, Isabel María},
}