Reproducibility and Validity of Strength of the Muscles in Hip Abduction with Flexion in the Sitting Position in Young Healthy Adults

Abstract

This study aimed to examine the reproducibility and validity of sitting Strength of the Muscles in Hip Abduction with Flexion (SMHAF) in young healthy adults. A total of 34 young healthy adults (15 men and 19 women) were included in the study. The reproducibility of sitting SMHAF was examined by determining the value of the intraclass correlation coefficient using the test–retest method. The validity of seated SMHAF was investigated by obtaining correlations between sitting SMHAF, supine SMHAF, and quadriceps muscle strength for both men and women. The reproducibility of the seated SMHAF was extremely high, with an intraclass correlation coefficient of 0.98. In both men and women, significant correlations as indices of lower limb muscle strength (p<0.05) were found between supine SMHAF and quadriceps muscle strength. These results indicate that seated SMHAF may be a reproducible and valid indicator of lower limb muscle strength in young healthy adults.