Evaluation of a Lower Leg Support Exoskeleton on Floor and Below Hip Height Panel Work.

Human Factors
Minerva V PillaiHomayoon Kazerooni

Abstract

The aim of this study is to determine the effectiveness of using a leg support exoskeleton (legX) in different modes on simulated work tasks which emulate real-world job tasks. Prolonged kneeling and squatting tasks increase the risk of work-related musculoskeletal disorders at the knee in industrial occupations. We evaluated legX capable of spring assistance throughout one's range of motion and/or locking support at a fixed angular position. Participants performed a dynamic panel task, alternating between hip and knee height, and a sustained floor level task with and without the exoskeleton. The exoskeleton was evaluated in spring mode, locking mode, and spring + locking mode for the panel task and only in locking mode for the floor task. The participants' (N = 15) muscle activity was recorded for the right lumbar erector spinae, thoracic erector spinae, tibialis anterior, rectus femoris, semitendinosus, and lateral gastrocnemius. Significant reduction of the rectus femoris activity was observed with the exoskeleton (median reduction: 22%-56% and peak reduction: 12%-48% for the panel task and median reduction: 57% and peak reduction:34% during the floor task). legX significantly reduces rectus femoris activity during squatted ...Continue Reading

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Citations

Apr 24, 2021·Frontiers in Neurorobotics·Zhuo WangYue Ma
Jun 3, 2021·International Journal of Environmental Research and Public Health·Yong-Ku KongKyeong-Hee Choi
Aug 21, 2021·Ergonomics·Niclas HoffmannRobert Weidner

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