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Work posture, workstation design, and musculoskeletal discomfort in a VDT data entry task
S L Sauter1, L M Schleifer, S J Knutson
1Division of Biomedical and Behavioral Science, National Institute for Occupational Safety and Health, Cincinnati, OH 45226.
Human Factors
|April 1, 1991
Summary
Video Display Terminal (VDT) users reported discomfort linked to workstation ergonomics. Poor posture and design, like low seat pans and high keyboards, significantly impact worker well-being and musculoskeletal health.
Area of Science:
- Occupational Health
- Ergonomics
- Human Factors Engineering
Background:
- Musculoskeletal discomfort is prevalent among Video Display Terminal (VDT) users.
- Understanding the relationship between workstation design and user discomfort is crucial for prevention.
- Previous research indicates potential links between posture, workstation setup, and pain syndromes.
Purpose of the Study:
- To investigate the association between objective ergonomic variables and self-reported musculoskeletal discomfort in VDT users.
- To identify specific workstation design factors contributing to discomfort at various body sites.
- To provide evidence-based recommendations for improving VDT workstation ergonomics.
Main Methods:
- Collected self-report data on musculoskeletal discomfort from several hundred VDT users.
- Objectively assessed worker posture and workstation design for a subset of 40 VDT users.
- Employed multiple regression analyses to examine relationships between ergonomic factors and discomfort.
Main Results:
- Ergonomic factors significantly influenced musculoskeletal discomfort, explaining up to 38% of variance.
- Low, soft seat pans correlated with increased leg discomfort, highlighting postural constraint's importance.
- Higher keyboard height above elbow level increased arm discomfort; high neck/shoulder discomfort noted.
Conclusions:
- Workstation design and worker posture are critical determinants of musculoskeletal discomfort in VDT use.
- Specific interventions, such as adjusting seat pan properties and keyboard height, can mitigate discomfort.
- Further attention is needed to address cervicobrachial pain syndromes prevalent in VDT work environments.