Reclined postures in vehicle seats: Preferred seatback contours and head support locations.

Reclined postures in vehicle seats have received increasing attention due to vehicle automation, but research using current seats may not be applicable. Furthermore, published recommendations for longitudinal seat back contour in automotive seats are difficult to apply to seat design due to insufficient information concerning reference points and contours. To address these gaps, a laboratory study was conducted with a specially constructed seat with a seat back pivot coincident with the seat H-point.