Influence of Sacroiliac Bracing on Muscle Activation Strategies During Two Functional Tasks in Standing-Tolerant and Standing-Intolerant Individuals.

Influence of Sacroiliac Bracing on Muscle Activation Strategies During Two Functional Tasks in Standing-Tolerant and Standing-Intolerant Individuals. J Appl Biomech. 2018 Nov 13;:1-29 Authors: Edgar K, Appel A, Clay N, Engelsgjerd A, Hill L, Leeseberg E, Lyle A, Nelson-Wong E Abstract People who develop low back pain (LBP) during standing (standing-intolerant) are a sub-clinical group at risk for clinical LBP. Standing-intolerant individuals respond favorably to stabilization exercise, and may be similar to people with sacroiliac joint dysfunction (SIJD) that respond to stabilization approaches including sacroiliac joint (SIJ) bracing. The purpose was to characterize muscle activation and response to SIJ bracing in standing-tolerant and standing-intolerant individuals during forward flexion and unilateral stance. Trunk and hip EMG data were collected from 31 participants, 17 standing-tolerant and 14 standing-intolerant, while performing these tasks with and without SIJ bracing. Kinematics were captured concurrently and used for movement phase identification. Cross-correlation quantified trunk coactivation and extensor timing during return-to-stand from forward flexion; rms amplitude quantified gluteal activity during unilateral stance. The standing-intolerant group had elevated erector spinae-external oblique coactivation without bracing, and erector spinae-internal oblique coactivation with bracing during return-to-stand compared wi...
Source: Journal of Applied Biomechanics - Category: Sports Medicine Tags: J Appl Biomech Source Type: research