However, there have been few studies regarding changes in spinopelvic parameters in the sitting position. In particular, it is now recognized that spinopelvic alignment is important for maintaining an energy-efficient posture for both normal and disease states. The relationship between the pelvis and the spine has previously been overlooked as a contributor to sagittal balance. The use of a lumbar support also reduces intradiscal pressure and the myeloelectric activity in the posterior paraspinal muscles. Keegan found that using a lower back support can prevent the flattening of the lumbar lordosis (LL) upon sitting. Sitting may contribute to flattening of the lumbar curve and an increase in intradiscal pressure.
US children and adults spend approximately 55% of their working hours or 7.7 hours/day in sedentary postures. Sitting on a chair is one of the most common positions for humans. Prolonged sitting is generally accepted as an important risk factor for LBP and it is frequently suggested that a lordotic posture should be maintained in the lumbar spine while sitting. LBP recurrence rates are reported to be up to 90%, even though many cases are self-limiting and require minimal treatment. Low back pain (LBP) is a common problem, causing both morbidity and socioeconomic loss, with a lifetime incidence rates 50% and 90%, respectively.
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