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

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

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.

Idioma originalInglés
Número de artículo113145
PublicaciónPhysiology and Behavior
Volumen227
DOI
EstadoPublicada - 1 dic 2020

Áreas temáticas de ASJC Scopus

  • Psicología experimental y cognitiva
  • Psicobiología

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