Reliability of an isometric test for measuring the strength of the hip abductors and adductors
Keywords:Muscle strength dynamometer, Isometry, Load Cell, Intraclass Correlation Coefficient
This study aimed to measure the reliability of a test for measuring the strength and strength imbalance of the hip abductors and adductors, using isokinetic equipment adapted for isometric testing. Thirteen healthy, physically active male individuals took part in the research. Two unilateral isometric tests were undertaken using a load cell attached to an adapted abductor bench machine: a hip abduction test and hip adduction test. Tests consisted of two maximum voluntary isometric contractions made for six seconds with a break of one minute between each. The following dynamic variables were measured: maximum force, mean force, rate of force development for each limb (right and left), and the existence of asymmetries between the limbs. For statistical analysis, the t-test, intraclass correlation coefficient (ICC), and standard error of measurement (SEM) were applied. Results: The methodology utilized for the evaluation of the hip abductors and adductors did not show reliability in most of the parameters researched, with the ICC neither sufficient or low, and the retest performance higher than the test (p < 0.05). The applied test was not reliable for assessing strength and strength imbalances of hip abductors and adductors in most of the parameters investigated. These results indicate that the hip joints, more precisely, the abductor and adductor muscles, are complex structures to be assessed. They need to be previously familiarized with the proposed exercise, as their performance does not occur habitually. It is recommended to develop new tests in order to measure hip abduction and adduction strength adding a prior familiarization procedure.
How to Cite
Copyright (c) 2020 Manoella Regina de Souza Silva, Thiago Keitiney Souza Teixeira da Silva, Valdemi Xavier Delmondes Junior, Silvia Ribeiro Santos Araújo, Adriano Percival Calderaro Calvo, Jacielle Carolina Ferreira
This work is licensed under a Creative Commons Attribution 4.0 International License.