Between-group comparison of surface electromyography (EMG) and ground reaction force data of patients with sacroiliac joint (SIJ) pain and controls with and without pelvic belt application.

<p>No significant differences in the muscle activities of SIJ patients and healthy controls were observed. Also, no differences were observed in the center of pressure (COP) data, derived from the pressure distribution data in one-leg stance. Values are given as mean values, standard deviation and p-values.</p><p>Between-group comparison of surface electromyography (EMG) and ground reaction force data of patients with sacroiliac joint (SIJ) pain and controls with and without pelvic belt application.</p

Pelvic belt application.

<p>A SacroLoc belt (Bauerfeind AG, Zeulenroda-Triebes, Germany) is applied to a female volunteer under moderate tension, as recommended by the manufacturer.</p

Summary of the experimental setup.

<p>Summary of the experimental setup.</p

Morphometrical measurements.

<p>On basis of 3 Tesla magnetic resonance imaging, angles and spatial relations were compared at the pelvis. ASIS = anterior superior iliac spine, ax = axial plane, co = coronal plane, cd = caudal, cr = cranial, d = dorsal, l = left, MRI = magnetic resonance imaging, PSIS = posterior superior iliac spine, r = right, S _1,2,etc. = first (second, etc.) sacral vertebral body, sa = sagittal plane, Th ₁₂ = twelfth thoracic vertebral body, v = ventral, ∡ = angle.</p

11-point Numerical rating scale (NRS) data on pain intensity.

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116739#pone.0116739.g006" target="_blank">Fig. 6A</a>: Non-significantly altered pain intensity was observed in sacroiliac joint pain patients with belt application under moderate tension, while maximum tension slightly increased pain intensity. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116739#pone.0116739.g006" target="_blank">Fig. 6B</a>: Comparison to the condition without pelvic belt (Δ NRS) revealed that moderate tension tended to change pain intensity more effectively than maximum tension in patients with sacroiliac joint pain on a non-significant level.</p