alexa Effect of table top slope and height on body posture and muscular activity pattern.
General Science

General Science

Journal of Ergonomics

Author(s): Hassane M, Hamaoui A, Zanone PG

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Abstract The objective of this study was to assess the effect of table top slope and height on body posture and muscular activity pattern. Twelve asymptomatic participants performed a 5-min reading task while sitting, in six experimental conditions manipulating the table top slope (20° backward slope, no slope) and its height (low, medium, up). EMGs recordings were taken on 9 superficial muscles located at the trunk and shoulder level, and the angular positions of the head, trunk and pelvis were assessed using an inertial orientation system. Results revealed that the sloping table top was associated with a higher activity of deltoideus pars clavicularis (P<0.05) and a smaller flexion angle of the head (P<0.05). A tentative conclusion is that a sloping table top induces a more erect posture of the head and the neck, but entails an overload of the shoulder, which might be harmful on the long run. Copyright © 2014 Elsevier Masson SAS. All rights reserved. This article was published in Ann Phys Rehabil Med and referenced in Journal of Ergonomics

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