Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22690
Title: Biomechanical response of the musculoskeletal system to whole body vibration using a seated driver model
Authors: Li, W
Zhang, M 
Lv, G
Han, Q
Gao, Y
Wang, Y
Tan, Q
Zhang, M
Zhang, Y
Li, Z
Keywords: AnyBody Modeling System
Backrest inclination
Musculoskeletal model
Vibration
Issue Date: 2015
Publisher: Elsevier
Source: International journal of industrial ergonomics, 2015, v. 45, no. , p. 91-97 How to cite?
Journal: International journal of industrial ergonomics 
Abstract: Objective: This study aimed to assess the effects of backrest inclination and vibration frequency on muscle activity in a dynamic environment using a musculoskeletal model.
Method: The muscle activity modeling method was used to analyze a full body musculoskeletal system of a seated person with a public domain rigid body model in an adjustable car seat. This model was established using AnyBody Modeling System, based on the inverse dynamic approach. And the min/max criterion in dealing with the muscle redundancy problem. Ten healthy subjects were exposed to whole body vibration (WBV) with five frequencies (3, 4.5, 6, 7, and 8Hz) in the vertical direction in a randomized order on three separate days. The displacement of the seat-pan and head was measured using a hybrid Polaris spectra system to obtain the seat-to-head (STH) transmissibility. Muscle oxygenation was measured using near-infrared spectroscopy. The validity of the model was tested using STH transmissibility and muscle oxygenation.
Results: Increased vibration frequency caused high muscle activities of the abdomen and the right leg with a backrest forward inclination angle. The muscle activities of the left leg decreased at a backrest backward inclination except at inclination angles of 15¢X and 30¢X. Muscle activity of the lumbar suddenly increased at a backre
URI: http://hdl.handle.net/10397/22690
ISSN: 0169-8141
EISSN: 1872-8219
DOI: 10.1016/j.ergon.2014.12.006
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