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A sit-stand desk is an intermediate form of office workstation between a typical seated desk and a standing desk. It allows the user to position the workstation at a level convenient for sitting or standing. Sit-stand desks may be effective at reducing sitting time during the work day between 30 minutes and two hours per working day but the evidence is very low quality. It is unclear if sit-stand desks have health benefits.
Video Sit-stand desk
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Source of the article : Wikipedia