TY - JOUR
T1 - Assessment of a passive exoskeleton system on spinal biomechanics and subjective responses during manual repetitive handling tasks among construction workers
AU - Antwi-Afari, Maxwell Fordjour
AU - Li, Heng
AU - Anwer, Shahnawaz
AU - Li, Dawei
AU - Yu, Yi
AU - Mi, Hao Yang
AU - Wuni, Ibrahim Yahaya
N1 - Funding Information:
The authors acknowledged these funding grants: 1. General Research Fund (GRF) Grant (BRE/PolyU 152047/19E) entitled “In search of a suitable tool for proactive physical fatigue assessment: an invasive to non-invasive approach”; 2. General Research Fund (GRF) Grant (BRE/PolyU 15210720) entitled “The development and validation of a non-invasive tool to monitor mental and physical stress in construction workers” and 3. Aston Institute for Urban Technology and the Environment (ASTUTE), Seedcorn Grants Proposal entitled “Wearable insole sensor data and a deep learning network-based recognition for musculoskeletal disorders prevention in construction”. All raw data that support the findings of this study are available from the corresponding author upon reasonable request.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - An exoskeleton system can be an effective ergonomic intervention for mitigating the risks of developing work-related musculoskeletal disorders, yet little attention is given to the effects of its application on physical risk factors and subjective responses. Therefore, the objective of this study was to examine the effects of a passive exoskeleton system on spinal biomechanics and subjective responses during manual repetitive handling tasks among construction workers. Muscle activity of the Thoracic Erector Spinae (TES), Lumbar Erector Spinae (LES) at L3 vertebrae level, Rectus Abdominis (RA), and External Oblique (EO) during the repetitive handling tasks were measured by surface electromyography (sEMG). Additionally, the Borg categorical rating scale (Borg CR 10), local perceived pressure (LPP), and system usability scale (SUS) were used to measure the ratings of perceived discomfort, perceived musculoskeletal pressure, and system usability, respectively. Our results found that: (1) the use of the passive exoskeleton system significantly reduced LES muscle activity (11–33% MVC), with a greater reduction in LES muscle activity (32.71% MVC) for the heaviest lifting load; (2) the use of the passive exoskeleton system significantly reduced perceived discomfort scores (42.40%) of the lower back for the heaviest lifting load; (3) increased lifting load significantly increased LPP scores of the shoulder, lower back, and leg body parts; and (4) majority of the participants rated the passive exoskeleton system as having acceptable usability. The findings of these results indicate that the developed passive exoskeleton system could reduce the internal muscle force, extensor moments, and spinal forces in the lumbar region.
AB - An exoskeleton system can be an effective ergonomic intervention for mitigating the risks of developing work-related musculoskeletal disorders, yet little attention is given to the effects of its application on physical risk factors and subjective responses. Therefore, the objective of this study was to examine the effects of a passive exoskeleton system on spinal biomechanics and subjective responses during manual repetitive handling tasks among construction workers. Muscle activity of the Thoracic Erector Spinae (TES), Lumbar Erector Spinae (LES) at L3 vertebrae level, Rectus Abdominis (RA), and External Oblique (EO) during the repetitive handling tasks were measured by surface electromyography (sEMG). Additionally, the Borg categorical rating scale (Borg CR 10), local perceived pressure (LPP), and system usability scale (SUS) were used to measure the ratings of perceived discomfort, perceived musculoskeletal pressure, and system usability, respectively. Our results found that: (1) the use of the passive exoskeleton system significantly reduced LES muscle activity (11–33% MVC), with a greater reduction in LES muscle activity (32.71% MVC) for the heaviest lifting load; (2) the use of the passive exoskeleton system significantly reduced perceived discomfort scores (42.40%) of the lower back for the heaviest lifting load; (3) increased lifting load significantly increased LPP scores of the shoulder, lower back, and leg body parts; and (4) majority of the participants rated the passive exoskeleton system as having acceptable usability. The findings of these results indicate that the developed passive exoskeleton system could reduce the internal muscle force, extensor moments, and spinal forces in the lumbar region.
KW - Construction workers
KW - Ergonomic intervention
KW - Exoskeleton
KW - Manual repetitive handling tasks
KW - Muscle activity
UR - http://www.scopus.com/inward/record.url?scp=85109190557&partnerID=8YFLogxK
U2 - 10.1016/j.ssci.2021.105382
DO - 10.1016/j.ssci.2021.105382
M3 - Journal article
AN - SCOPUS:85109190557
SN - 0925-7535
VL - 142
JO - Safety Science
JF - Safety Science
M1 - 105382
ER -