Arm-support exoskeleton reduces shoulder muscle activity in ceiling construction.

Area of Science:

• Occupational health and safety
• Human-robot interaction
• Ergonomics

Background:

• Exoskeletons are increasingly studied for workplace applications.
• Previous research often focuses on isolated movements, not complex, real-world tasks.
• Ceiling construction involves strenuous, repetitive overhead work, posing ergonomic risks.

Purpose of the Study:

• To evaluate the effectiveness of an arm-support exoskeleton in realistic ceiling construction tasks.
• To assess construction workers' subjective experience and impression of the exoskeleton.
• To determine the impact of the exoskeleton on shoulder muscle activity and perceived exertion.

Main Methods:

• 11 construction workers performed 9 defined ceiling construction tasks.
• Objective efficacy was measured by shoulder muscle activity (electromyography).
• Subjective efficacy and user impression were assessed via perceived exertion and questionnaires.

Main Results:

• Wearing the arm-support exoskeleton led to significant reductions in shoulder muscle activity (up to 58%).
• Perceived exertion was decreased while wearing the exoskeleton.
• Workers reported minimal hindrance and a high intention for future use, with no increase in antagonistic muscle activity.

Conclusions:

• Arm-support exoskeletons show high potential for reducing shoulder muscle load in dynamic construction environments.
• The technology is effective and well-received by workers in complex, realistic work scenarios.
• Exoskeletons can improve working conditions and reduce physical strain for ceiling construction workers.