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A passive upper-limb exoskeleton reduced muscular loading during augmented reality interactions.

Yong-Ku Kong1, Sang-Soo Park1, Jin-Woo Shim1

  • 1Department of Industrial Engineering, Sungkyunkwan University, Corvallis, OR, USA.

Applied Ergonomics
|February 5, 2023
PubMed
Summary

A passive upper-limb exoskeleton significantly reduced shoulder muscle activity and discomfort during augmented reality (AR) tasks. This wearable technology offers a promising ergonomic solution for preventing shoulder injuries in AR users.

Keywords:
3-dimensional motion captureComputer-human interactionMusculoskeletal discomfortPassive exoskeletons

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Area of Science:

  • Ergonomics
  • Human-Computer Interaction
  • Wearable Technology

Background:

  • Augmented reality (AR) interactions can cause significant musculoskeletal load on the shoulders.
  • Repetitive AR tasks may increase the risk of shoulder discomfort and injuries.

Purpose of the Study:

  • To evaluate a passive upper-limb exoskeleton for reducing shoulder musculoskeletal load during AR tasks.
  • To assess the impact of an exoskeleton on muscle activity, joint posture, and user-reported discomfort.

Main Methods:

  • A repeated-measures laboratory study involving 20 participants performing AR tasks.
  • Collected data on muscle activity (deltoids, trapezius), shoulder joint kinematics, and self-reported discomfort.
  • Compared outcomes with and without a commercially-available passive upper-limb exoskeleton.

Main Results:

  • The exoskeleton significantly reduced muscle activity in the upper trapezius and deltoid groups.
  • Self-reported discomfort levels were significantly lower when using the exoskeleton.
  • No significant changes were observed in shoulder joint postures or AR task performance.

Conclusions:

  • Passive upper-limb exoskeletons can effectively mitigate shoulder muscle load and discomfort during AR use.
  • This technology presents a viable ergonomic control to reduce musculoskeletal injury risks in AR applications.
  • Exoskeletons show potential for enhancing user comfort and safety in immersive technology environments.