Article Dans Une Revue Gait & Posture Année : 2016

Effect of seat and table top slope on the biomechanical stress sustained by the musculo-skeletal system

Résumé

The purpose of this study was to assess the effect of table and seat slope on the biomechanical stress sustained by the musculo-skeletal system. Angular position of the head and trunk, and surface electromyography of eleven postural muscles were recorded while seated under different conditions of seat slope (0°, 15° forward) and table slope (0°, 20° backward). The specific stress sustained by C7-T1 joint was estimated with isometric torque calculation. The results showed that the backward sloping table was associated with a reduction of neck flexion and neck extensors EMG, contrasting with a concurrent overactivity of the deltoideus. The forward sloping chair induced an anterior pelvic tilt, but also a higher activity of the knee (vasti) and ankle (soleus) extensors. It was concluded that sloping chairs and tables favor a more erect posture of the spine, but entails an undesirable overactivity of upper and lower limbs muscles to prevent the body from sliding.

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Dates et versions

hal-02342062 , version 1 (31-10-2019)

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Alain Hamaoui, Myriam Hassaïne, Bruno Watier, Pier-Giorgio Zanone. Effect of seat and table top slope on the biomechanical stress sustained by the musculo-skeletal system. Gait & Posture, 2016, 43, pp.48-53. ⟨10.1016/j.gaitpost.2015.10.024⟩. ⟨hal-02342062⟩
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