Open AccessInfluence of a Back-Support Exoskeleton on Physical Demands of Rebar Work
Author(s) -
Nihar Gonsalves,
Omobolanle Ogunseiju,
Abiola Akanmu,
Chukwuma Nnaji
Publication year - 2021
Publication title -
epic series in built environment
Language(s) - English
Resource type - Conference proceedings
ISSN - 2632-881X
DOI - 10.29007/5rg3
Subject(s) - exoskeleton , tying , work (physics) , range of motion , muscle fatigue , rebar , physical medicine and rehabilitation , erector spinae muscles , computer science , engineering , simulation , electromyography , physical therapy , medicine , structural engineering , mechanical engineering , operating system
Low back injuries are a major concern in the construction industry. Rebar workers develop lower back injuries as a result of prolonged awkward positions and repetitive motions. Exoskeletons can be an effective intervention for preventing back injuries. However, little is known regarding the potential impacts of their use on physical demands of construction work. This study presents an evaluation of the effects of a commercially available exoskeleton during simulated rebar work. Assessment of the exoskeleton was based on muscle activity and range of motion of the back during placing and tying subtasks of the rebar work. With the exoskeleton, muscle activity reduced in the erector spinae group by 10–30% during placing subtask. Latissimus dorsi muscle group showed a reduced muscle activity of 7-31% during the placing subtask but increased by 1-14% during tying subtasks. The back range of motion reduced by 17.15% during placing subtask and increased by 23.41% during the tying subtask. The reduction in muscle activations and range of motion during placing subtask agrees with the intended design of Laevo. However, the increased muscle activities and range of motion are indicative of increased discomfort and fatigue. These results could be helpful in redesigning exoskeletons to significantly reduce injury risk in construction.