The Effect of Pelvic Compression Belt on the Strength of Hip Muscle and EMG Activity in Individuals with Sacroiliac Joint Pain during Prone Hip Extension

The articular surfaces of the sacroiliac joint (SIJ) are relatively flat and aligned close to the vertical plane.1 Flat joint surfaces are optimal for load transfer.2 However, alignment close to the vertical plane confers vulnerability to vertical shear forces caused by gravity,3 triggering SIJ instability that is attributable to creep of the long, dorsal sacroiliac and sacrotuberous ligaments under prolonged loads.4 Sub-optimal SIJ stability is associated with lumbopelvic,5 groin,6 hamstring,7 and/or low back pain (LBP).8,9 The prevalence of sacroiliac joint pain (SIJP) is 13–30% in patients with non-specific LBP.8,10 Therefore, numerous efforts have been made to enhance SIJ stability. Effective SIJ load transfer and stability requires optimal passive, active, and neuromuscular joint control.1,11,12 These functions vary among individuals by anatomical articular stability (form closure) and neuromuscular stability (force closure) during performance of various activities.13 In clinical practice, force closure is reinforced via strengthening of pelvic and trunk muscles, including the gluteus maximus (GM), biceps femoris (BF), latissimus dorsi (LD), The Effect of Pelvic Compression Belt on the Strength of Hip Muscle and EMG Activity in Individuals with Sacroiliac Joint Pain during Prone Hip Extension