The effects of a posterior superior iliac spine support device on upper trunk acceleration during gait in individuals with flat lumbar back posture.

Background: The orientation of the pelvis is of particular importance to the sagittal curve of the spine and has geometric relationships with the top of the spine and lumbar lordosis. Changes in spinal shape or disruptions of sagittal balance in the spine, such as a flattened lumbar spine, have significant negative effects.

Objective: The aim of this study was to investigate the effects of the posterior superior iliac spine support device (PSD) on upper trunk acceleration during gait in individuals with flat lumbar back posture.