title: Effect of pelvic forward tilt on low back compressive and shear forces during a manual lifting task.
abstract: [Purpose] To examine the effect of an instruction to increase pelvic forward tilt on low back load during a manual lifting task in the squat and stoop postures. [Subjects] Ten healthy males who provided informed consent were the subjects. [Methods] Kinetic and kinematic data were captured using a 3-dimensional motion analysis system and force plates. Low back compressive and shear forces were chosen as indicators of low back load. The subjects lifted an object that weighed 11.3 kg, under the following 4 conditions: squat posture, stoop posture, and these lifting postures along with an instruction to increase pelvic forward tilt. [Results] In the squat posture, the instruction to increase pelvic forward tilt reduced the low back compression and shear forces. [Conclusion] The present results suggest that a manual lifting task in the squat posture in combination with an instruction to increase pelvic forward tilt can decrease low back compression and shear forces, and therefore, might be an effective preventive method for low back pain in work settings.
authors.affiliation: Rehabilitation Center, Saiseikai Kanagawaken Hospital, Japan; Graduate School of International University of Health and Welfare, Japan.
authors.forename: Shota
authors.initials: S
authors.lastname: Hayashi
authors.affiliation: Graduate School of International University of Health and Welfare, Japan; Department of Medical Research and Management for Musculoskeletal Pain 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo Hospital, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Katsuhira
authors.affiliation: Department of Medical Research and Management for Musculoskeletal Pain 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo Hospital, Japan.
authors.forename: Ko
authors.initials: K
authors.lastname: Matsudaira
authors.affiliation: Graduate School of International University of Health and Welfare, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Maruyama
keywords: Low back load; Manual lifting task; Motion analysis