Exoskeletons are a solution to physically relieve workers while allowing them to control the execution of their tasks and assist them (Baltrusch et al.2018). The study investigated in the search for elements able to quantify the action of a physical assistance device (PAD) on the human body for movements responsible for pathologies recognized as occupational diseases. The evaluation of a PAD allows to determine in which framework the exoskeleton can be useful for the realization of the movement. It is specified that a relevant way to insert exoskeletons in a company by always implementing a study or analysis beforehand to ensure its good integration. The objective of the study is to perform several tasks with and without the Posture Harness (HAPO) in order to analyze the kinematics of the movements and the electrical activity of erector muscles of the spine involved in carrying a load at work to understand its effects on the human body.
Work-related musculoskeletal disorders are causing occupational diseases. While allowing them to control the execution of their picking task, one solution to physically relieve workers performing trunk flexions is to assist them with an exoskeleton. This preliminary study focuses on the determination of the appropriate measurements systems (motion capture and electromyography) to characterize dedicated trajectories of movements responsible of lower back pathologies. Three tests have been realized with and without a back-assisting exoskeleton for loaded box picking. The results of the study help us to understand which body strategies were used to perform the same task from one individual to another under different conditions. This preliminary study validates this multimodal approach to show the use of a back-assisting exoskeleton for posture harness in dynamic conditions.
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