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Getting to Compliance in Forced Exercise in Rodents: A Critical Standard to Evaluate Exercise Impact in Aging-related Disorders and Disease

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Do age and work pace affect variability when performing a repetitive light assembly task?

Martine A Gilles¹, Clarisse Gaudez¹, Jonathan Savin²

¹HT Department, INRS Lorraine, 1, rue du Morvan CS60027, 54 519, Vandœuvre Cedex, France.

Applied Ergonomics

|October 11, 2021

Summary

This summary is machine-generated.

Workers performing repetitive tasks can vary their movement sequences, known as ways of doing (WoD), to reduce physical strain. Neither age nor work pace influenced the number of WoDs chosen, but different WoDs impacted kinematic variables.

Keywords:

Age Pace Repetitive task Variability

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Area of Science:

Ergonomics
Human Factors Engineering
Biomechanics

Background:

Repetitive tasks in manufacturing can lead to musculoskeletal strain.
Understanding movement variability is crucial for optimizing worker well-being.
Individual differences in task execution are often observed but not fully characterized.

Purpose of the Study:

To investigate if a repetitive assembly task can be performed using different movement sequences (Ways of Doing - WoD).
To determine if participant age or work pace influences the selection of WoDs or their kinematic parameters.
To explore the potential of varied WoDs in mitigating physical strain during repetitive work.

Main Methods:

Sixty-two male participants across three age groups performed a light assembly task for 20 minutes at two work paces.
Movement sequences (WoDs) were identified using video coding and kinematic analysis, including upper limb kinematics and approximate entropy (ApEn).
Vertical force and kinematic parameters were measured to characterize different WoDs.

Main Results:

Five distinct Ways of Doing (WoD) were identified and utilized by participants.
Neither participant age nor work pace significantly affected the number of WoDs selected.
While WoDs varied in movement sequence and kinematic approximate entropy (ApEn), production rate remained consistent.

Conclusions:

Allowing operators to vary their Ways of Doing (WoD) in repetitive tasks may reduce locomotor system strain.
Movement variability is a key factor in task performance and potential strain reduction.
Task design should consider enabling operator autonomy in movement execution to enhance ergonomics.