Before, and 3 and 6 months after the start of the study, the low back load was estimated by lumbar examination and subjective evaluation of low back pain. For 6 months, 30 used the new seat, and the other 30 used the standard seat. The existing seat in their personal vehicles was replaced with the new seat for 30 subjects. Sixty male subjects, who commuted 5 times/week for about 50 min/trip with the standard seat and complained of low back pain in driving, were selected from a group of 1600 subjects. the standard seat: (1) a lumbar support, (2) side supports, (3) seat is firmer at the ischial tuberosity region, but it is softer at the femoral region, (4) a head rest which is adjustable sagittally, and (5) a rubber mat under the seat. The new seat has the following characteristics vs. The purpose of this study is to compare the low back load in a long-term driving experiment between two different types of driver seats (the new seat and the standard seat). ![]() Therefore it is important to design a car driver seat with less load to reduce low back pain. Low back pain is a significant health problem for professional drivers.
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