Comparison of the electromyographic recruitment of the posterior oblique sling muscles during prone hip extension among three different shoulder positions

Electromyographic Activity of Posterior Oblique Sling Muscles During Gait in Subjects with Chronic Non-Specific Low Back Pain versus Healthy Controls

“…Although there was no statistically significant difference between subjects with CNSLBP and healthy controls in the recruitment of the GMax muscle, subjects in the CNSLBP group showed a slightly lower activity pattern of GMax muscle during walking than those healthy subjects. The GMax muscle plays an important role in controlling the lumbosacral spine and if weak, it can contribute to the development of low back pain (14,(29)(30)(31)(32). Previous literature, however, showed contradictory results regarding the recruitment of GMax muscle in patients with CNSLBP.…”

Activity of Posterior Oblique Sling Muscles during Quadruped Hip Extension with Different Shoulder Positions

“…The POS muscles are involved in dynamic lumbo-pelvic stability, and the thoracolumbar fascia, latissimus dorsi, erector spinae, gluteus maximus, and biceps femoris connect the upper extremities to the lower extremities by crossing the posterior side of the body in an 'X' shape [5,12]. Previous studies have mostly measured the EMG of the POS muscles in the prone position [6,10]. However, Kim et al [13] reported that contralateral arm and leg lifts in the quadruped position are more effective in selectively increasing the EMG of the lumbar muscles compared with trunk extension in the prone position.…”

“…The root mean square (RMS) was computed from the raw EMG data. EMG signals were standardized using reference voluntary contractions (% RVCs) [10]. EMG was measured before muscle contraction.…”

“…In previous studies, POS muscle activities were measured according to different shoulder positions during PHE. As a result, it was reported that shoulder position affects POS muscle activities during PHE, with an impact on lumbopelvic stabilization [5,10]. However, no studies have been conducted before to evaluate the impact of varying shoulder positions on POS muscle activities in the quadruped position.…”

Tensile Force Transmission from the Upper Trunk to the Contralateral Lower Leg throughout the Posterior Oblique Sling System

“…However, most precedent studies focused only on the unilateral lower extremity linking the ankle to the hip joint or the influence of upper body motion in the sagittal plane when including the upper body. Recent studies demonstrated that the latissimus dorsi is connected to the contralateral gluteus maximus through the posterior oblique sling (POS) system, which is distally connected to as far as the hamstring [23][24][25][26]. Anatomically, the hamstring is also linked to the terminal end by passive connective and neural tissues [27,28].…”