Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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Effect of Wearable Passive Back Support Exoskeleton on the Peak Muscle Activation of the Erector Spinae Muscles During Lifting

  • Hee-Eun Ahn (Physical Therapy Section, Department of Rehabilitation Medicine, National Transportation Rehabilitation Hospital) ;
  • Tae-Lim Yoon (Department of Physical Therapy, College of Health and Medical Science, Cheongju University)
  • Received : 2023.11.16
  • Accepted : 2023.11.29
  • Published : 2024.04.20
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Abstract

Background: Using wearable passive back-support exoskeletons in workplace has attracted attention as devices that support the posture of workers, enhance their physical capabilities, and reduce physical risk factors. Objects: This study aimed to investigate the effect of a wearable passive back-support exoskeleton on the activity of the erector spinae muscles during lifting tasks at various heights. Methods: Twenty healthy adult males were selected as subjects. Electromyography (EMG) was used to assess the activity of the erector spinae muscles while performing lifting tasks at three distinct heights (30, 40, and 50 cm), with and without the application of the Wearable Passive Back Support Exoskeleton. EMG data were gathered before and after the application of the orthosis. Results: The use of the Wearable Passive Back Support Exoskeleton resulted in a significant decrease in muscle activity when lifting a 10 kg object from heights of 30 and 40 cm (p < 0.05). Additionally, there was a significant reduction in muscle activity when lifting from a height of 50 cm compared with that at lower heights (p < 0.05). Conclusion: The use of a wearable passive back-support exoskeleton led to a decrease in the activity of the erector spinae muscles during lifting tasks, irrespective of the object's height. Our results suggest that the orthosis we tested may help decrease risk of lower back injuries during lifting.

Keywords

Acknowledgement

The authors thank to Eun-cheol Kim, Sun-woo Han, Do-uk Kang, Ji-young Lee, and Min-seo Hong for advice on experimental and statistical analysis.

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