Effect of reclining angle on lumbar lordosis at driving posture: A radiological evaluation
- Authors
- Nam, Hyung Seok; Han, Manyong; Choi, Hyung Yun; Song, Kyuman; Kang, Seonggyu; Ahn, Sung Min; Lee, Shi-Uk
- Issue Date
- 2018
- Publisher
- IOS PRESS
- Keywords
- Lumbar lordosis; reclining angle; driver' s seat
- Citation
- JOURNAL OF BACK AND MUSCULOSKELETAL REHABILITATION, v.31, no.5, pp.923 - 930
- Journal Title
- JOURNAL OF BACK AND MUSCULOSKELETAL REHABILITATION
- Volume
- 31
- Number
- 5
- Start Page
- 923
- End Page
- 930
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/4760
- DOI
- 10.3233/BMR-170875
- ISSN
- 1053-8127
- Abstract
- BACKGROUND: Optimal seatback angles for automobile drivers' seats have been investigated based on comfort and back muscle activities; however, radiology supported evidences are scarce. OBJECTIVE: The aim of this study was to evaluate optimal range of the seatback reclining regarding torso angles for an automobile driver's seat to preserve lumbar lordosis. METHODS: Thirty-one healthy volunteers were recruited among five body type categories. Lateral lumbar spine X-rays were obtained for the neutral sitting posture without seatback (reference), and with reclining angles of 23 degrees to 33 degrees by 2 degrees intervals. The Cobb angles for the L1 L4, L4-S1, and L1-S1 segments were measured. RESULTS: The Cobb angle for L4-S1 was nearest to the reference (18.74 +/- 1.57 degrees, mean +/- standard error mean) at reclining angles of 29 degrees and 31 degrees (14.51 +/- 1.41 degrees and 14.47 +/- 1.43 degrees, respectively). The Cobb angle at L4-S1 between reclining angles of 27 degrees (12.02 +/- 1.31 degrees) and 29 degrees (14.51 +/- 1.41 degrees) were significantly different (p < 0.001). Tall men showed relatively preserved lordosis angles at all reclining angles. Fat men and short women demonstrated prominent loss of lordosis with excessively kyphotic L1-L4 segment. CONCLUSIONS: Reclining angles of 29 degrees to 31 degrees revealed to be optimal for preserving lordosis at the L4-S1 segment. Individualized healthcare-related guideline for driver's seat adjustment setting is necessary.
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Collections - College of Architecture > Architecture Major > 1. Journal Articles
- College of Engineering > Department of Mechanical and System Design Engineering > 1. Journal Articles
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