Trunk stability with abdominal draw-in (hollowing) exercise versus abdominal bracing exercise.

Abstract

Trunk stabilization training has grown in popularity. There are generally two accepted methods of implementing trunk stabilization training: abdominal bracing and abdominal hollowing. The purpose of this research study is to investigate the most effective stabilization method to increase trunk stability. We hypothesized that there will be no significant difference in trunk stability in those who perform abdominal draw-in exercises (hollowing) compared to those who perform abdominal bracing exercises. Each participant was randomly assigned into abdominal bracing or abdominal hollowing experimental groups. Rehabilitative Ultrasound Imaging measurements of the abdominal muscles were taken before and after an 8 week trunk stabilization exercise intervention. The ability of each participant to stabilize their trunk was measured via trunk strength with a dynamometer. There was no significant difference between the groups with a repeated measures analysis of all dependant variables.