Postural stress in high-speed precision work

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Abstract
Posture plays a fundamental role in the knowledge which the operator has of his work space and in the gauging of the actions he performs there. Seen in this light, posture is a means of constructing a spatial reference and a spatial reference in itself. Some results of experiments and others obtained at the workplaces show a relation between speed and precision required for the task and postural immobility. Postural immobilization for a period of several hours is poorly tolerated and has serious consequences: it explains the neck, shoulder and back pains frequently experienced in these situations. These consequences, combined with the constraints of speed and precision, make such jobs unsuitable for persons above a certain age.

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