title: Musculoskeletal disorder risk as a function of vehicle rotation angle during assembly tasks.
abstract: Musculoskeletal disorders (MSD) are costly and common problem in automotive manufacturing. The research goal was to quantify MSD exposure as a function of vehicle rotation angle and region during assembly tasks. The study was conducted at the Center for Occupational Health in Automotive Manufacturing (COHAM) Laboratory. Twelve subjects participated in the study. The vehicle was divided into seven regions, (3 interior, 2 underbody and 2 engine regions) representative of work areas during assembly. Three vehicle rotation angles were examined for each region. The standard horizontal assembly condition (0° rotation) was the reference frame. Exposure was assessed on the spine loads and posture, shoulder posture and muscle activity, neck posture and muscle activity as well as wrist posture. In all regions, rotating the vehicle reduced musculoskeletal exposure. In five of the seven regions 45° of vehicle rotation represented the position that reduced MSD exposure most. Two of the seven regions indicated 90° of vehicle rotation had the greatest impact for reducing MSD exposure. This study demonstrated that vehicle rotation shows promise for reducing exposure to risk factors for MDS during automobile assembly tasks.
authors.affiliation: Biodynamics Laboratory, Center for Occupational Health in Automotive Manufacturing, The Ohio State University, 1971 Neil Avenue, Columbus, OH 43210, USA. ferguson.4@osu.edu
authors.forename: Sue A
authors.initials: SA
authors.lastname: Ferguson
authors.forename: Williams S
authors.initials: WS
authors.lastname: Marras
authors.forename: W
authors.initials: W
authors.lastname: Gary Allread
authors.forename: Gregory G
authors.initials: GG
authors.lastname: Knapik
authors.forename: Kimberly A
authors.initials: KA
authors.lastname: Vandlen
authors.forename: Riley E
authors.initials: RE
authors.lastname: Splittstoesser
authors.forename: Gang
authors.initials: G
authors.lastname: Yang
mesh_terms: D000328:Adult; D001336:Automobiles; D004576:Electromyography; D005260:Female; D006801:Humans; D007221:Industry; D008297:Male; D018482:Muscle, Skeletal; D009140:Musculoskeletal Diseases / Q000209:etiology* / Q000517:prevention & control; D009784:Occupational Diseases / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control; D016273:Occupational Exposure / Q000009:adverse effects* / Q000517:prevention & control; D016272:Occupational Health; D011187:Posture / Q000502:physiology*; D018570:Risk Assessment / Q000379:methods*; D012309:Risk-Taking; D013131:Spine; D013223:Statistics as Topic; D016474:Weight-Bearing