Biomechanical stresses in computer-aided design and in data entry

Area of Science:

• Occupational health
• Ergonomics
• Biomechanics

Background:

• Musculoskeletal disorders (MSDs) are a significant occupational health concern, particularly affecting the upper limbs.
• Computer use is prevalent in many professions, involving tasks like computer-aided design (CAD) and data entry.
• Understanding the risk factors associated with specific computer tasks is crucial for prevention.

Purpose of the Study:

• To investigate the risk factors for upper limb MSDs in two distinct computer-based work populations: CAD users and data entry operators.
• To compare the biomechanical demands and self-reported complaints between these two groups.

Main Methods:

• A comparative study involving two populations: computer-aided design (CAD) operators and data entry operators.
• Data collection included questionnaires on MSD complaints and working life.
• Biomechanical measurements assessed forces, angles, and movement repetitiveness of upper limbs during tasks.

Main Results:

• Upper limb MSD complaints were associated with the use of specific input devices.
• Operators performing CAD tasks exhibited higher grip forces on keyboards and mice compared to data entry operators.
• Biomechanical analysis revealed differences in forces and movement patterns between the two task groups.

Conclusions:

• The use of input devices, particularly in demanding tasks like CAD, is a significant risk factor for upper limb MSDs.
• Higher grip forces in CAD tasks may contribute to an increased risk of developing musculoskeletal complaints.
• Ergonomic interventions targeting input device usage and force reduction are recommended for CAD operators.