Some Effects of Lumbar Support Contour on Driver Seated Posture

Paper #:
  • 950141

Published:
  • 1995-02-01
Citation:
Reed, M., Schneider, L., and Eby, B., "Some Effects of Lumbar Support Contour on Driver Seated Posture," SAE Technical Paper 950141, 1995, https://doi.org/10.4271/950141.
Pages:
14
Abstract:
An appropriately contoured lumbar support is widely regarded as an essential component of a comfortable auto seat. A frequently stated objective for a lumbar support is to maintain the sitter's lumbar spine in a slightly extended, or lordotic, posture. Although sitters have been observed to sit with substantial lordosis in some short-duration testing, long-term postural interaction with a lumbar support has not been documented quantitatively in the automotive environment. A laboratory study was conducted to investigate driver posture with three seatback contours. Subjects† from four anthropometric groups operated an interactive laboratory driving simulator for one-hour trials. Posture data were collected by means of a sonic digitizing system. The data identify driver-selected postures over time for three lumbar support contours. An increase of 25 mm in the lumbar support prominence from a flat contour did not substantially change lumbar spine posture.
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