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A comparison of working postures of parcel sorters using three different working methods
J C Derksen1, M P Van Riel, J P Van Wingerden
1Department of Biomedical Physics and Technology, Faculty of Medicine and Allied Health Sciences, Erasmus University Rotterdam, The Netherlands.
Ergonomics
|February 1, 1994
Summary
A hydraulic lifting platform improved parcel sorter trunk posture by increasing erectness by 8-11%, reducing lumbar spine load. This makes it preferable to sorting tables for musculoskeletal health.
Area of Science:
- Occupational Health
- Ergonomics
- Biomechanics
Background:
- Parcel sorting involves physically demanding tasks impacting musculoskeletal health.
- Evaluating different workstation designs is crucial for preventing work-related injuries.
Purpose of the Study:
- To compare the musculoskeletal load of three parcel sorting working conditions.
- To determine if a hydraulic lifting platform is superior to sorting tables for reducing trunk strain.
Main Methods:
- Continuous trunk posture measurement of eight parcel sorters using the Portable Posture Registration Set (PPRS).
- Assessment across three working conditions: two sorting tables and a hydraulic lifting platform.
Main Results:
- The hydraulic lifting platform resulted in 8-11% greater trunk erectness compared to sorting tables.
- This increased erectness is associated with reduced load on the lumbar spine.
- Slightly increased sagittal back flexion was observed with the lifting platform.
Conclusions:
- The hydraulic lifting platform is recommended for parcel sorting due to reduced lumbar spine load.
- Proper utilization of the lifting platform is critical for maximizing ergonomic benefits.
- Findings inform decisions for new distribution center workstation design.