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The effect of workstation and task variables on forces applied during simulated meat cutting
Raymond W McGorry1, Patrick G Dempsey, Niall V O'Brien
1Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA, USA. raymond.mcgorry@libertymutual.com
Ergonomics
|November 17, 2004
Summary
Workstation adjustments and knife angling can reduce force and improve posture during meat cutting tasks. Productivity pace increases grip force and cutting moment, highlighting the need for ergonomic interventions.
Area of Science:
- Occupational Ergonomics
- Biomechanics
- Industrial Safety
Background:
- Repetitive meat cutting tasks pose risks for musculoskeletal disorders.
- Understanding force and postural exposures is crucial for injury prevention.
Purpose of the Study:
- To investigate workstation, tool, and task variables affecting force and posture in simulated meat cutting.
- To evaluate the impact of these variables on gripping force, cutting moment, elbow elevation, and wrist deviation.
Main Methods:
- A within-subject factorial design with 12 participants was employed.
- Variables included surface orientation, height, blade angle, cut complexity, and work pace.
- Kinetic and kinematic variables were measured during a simulated meat cutting task.
Main Results:
- Workstation height and orientation adjustments significantly influenced wrist and shoulder posture.
- Increased work pace led to higher grip force and cutting moment.
- Angling the knife blade improved upper extremity posture but slightly increased force exposure.
Conclusions:
- Adjustable workstations and specific knife angles can optimize posture and minimize risks.
- Work pace is a critical factor influencing biomechanical load during cutting tasks.
- Ergonomic interventions should consider the interplay between workstation design, tool use, and work demands.