Due to its complexity, the diagnosis and effective treatment of low back pain (LBP) is often difficult due to the lack of knowledge regarding its contributing factors. Therapists often treat the sacroilliac joint (SI) as a possible source or catastrophizing factor in patients with non-specific low back pain. Despite this, little is known regarding the kinematic differences in patients with LBP of SI origin versus those without SI involvement. The present study was undertaken to accurately determine the innominate movement patterns between these two populations. The authors concluded that SIJ-positive participants had differing trends of rotation and movement but not gross range of motion when compared to their SIJ-negative counterparts.