Influence of Hip Abduction Velocity and Position on the Onset Times of Gluteus Medius and Tensor Fascia Latae Relative to Quadratus Lumborum in Healthy Subject: A Pilot Study

Abstract

The aim of this study was to investigate the influence of hip abduction velocity and position change on the relative onset times of the gluteus medius, the tensor fascia latae, and the quadratus lumborum in healthy subjects. METHODS: For this study, 15 healthy young adults were recruited. The subjects were asked to move their hip joints up to 35 degrees of abduction at a speed of 70⁰/sec and 17.5⁰/sec in the supine and side-lying positions. Electromyography data was collected for the gluteus medius, tensor fascia latae, and quadratus lumborum to determine the onset times. RESULTS: There were significant differences between the fast speed (70⁰/sec) and the slow speed (17.5⁰/sec) in hip abduction in a supine position and in a side-lying position, relatively. The onset time of the gluteus medius was faster than that of the tensor fascia latae and the quadratus lumborum in the side-lying position at the speed of 70⁰/sec and 17.5⁰/sec.

Difference of Muscle Activity by Pelvic Tilt in Side-Lying Hip Abduction

“…Selective activation of the GM using side-lying hip abduction exercise is still controversial among researchers (Lee and Cynn, 2014;Macadam et al, 2015;Joseph and Kennifer, 2012;Kim et al, 2016).…”