Whole body movement and human-seat interface pressure distribution during dual lumbar continuous passive motion

Abstract

Recently we demonstrated that the dual CPM device works effectively in the prevention of low back pain during prolonged sitting. This device has two synchronized bladders, one providing lumbar support and one located in the front portion of the seat providing reciprocal motion. In the present study, whole body movements and pressure distribution changes at the human-seat interface were analyzed in 13 normal male volunteers. The benefits of the dual CPM over lumbar support CPM may be explained by equivalent, but unstrained anterior pelvic rotation in simultaneously synchronized motion modality and significantly larger motion in the lumbo-pelvic spine in reversely synchronized motion modality.