Behavior of the muscle quality index and isometric strength in elderly women

Daniel Jerez-Mayorga, Pedro Delgado-Floody, Leonardo Intelangelo, Christian Campos-Jara, Leonidas Arias-Poblete, Juan García-Verazaluce, Amador Garcia-Ramos, Luis Javier Chirosa

Research output: Contribution to journalArticlepeer-review

Abstract

This study aimed (I) to compare the muscle quality index (MQI) and the isometric hip strength between younger and older women, and (II) to determine the relationship of the MQI with the sit-to-stand test (STS) and isometric hip strength in younger and older women. Twenty-eight elderly women (age= 66.2 ± 5.6 years) and twenty younger women (21.2 ± 2.2 years) participated in the study. The following dependent variables were measured: MQI, STS, body composition, and the peak isometric strength of the hip (PF) which was also normalized using three different methods (PF/Body Mass, PF/Fat-Free Mass, and PF/Body Mass0,335). Older women presented a lower PF in hip flexion, extension and external rotation regardless of the method of normalization (p < 0.001), but the PF of hip abductors and internal rotators was higher for older women (p < 0.05). No significant differences were found in the MQI between older and younger women (p = 0.443). The MQI was negatively correlated with the time in the STS in older women (r = -0.706, p < 0.001) and younger women (r = -0.729, p < 0.001), while the correlations of MQI with isometric hip strength were weaker in older women (r range: -0.082 – 0.556) and younger women (r range: -0.020 – 0.309). MQI is a clinical and practical tool to assess the muscular power of the lower extremities.

Original languageEnglish
Article number113145
JournalPhysiology and Behavior
Volume227
DOIs
Publication statusPublished - 1 Dec 2020

Keywords

  • Functional electromechanical dynamometer
  • Muscle quality
  • Resistance exercise
  • Sit-to-stand test

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience

Fingerprint

Dive into the research topics of 'Behavior of the muscle quality index and isometric strength in elderly women'. Together they form a unique fingerprint.

Cite this