Abstract: A pressure-sensitive wrist pad placeable in front of a keyboard or other input device associated with a computer, the pad serving to warn an operator when in the course of operating the keyboard, the wrists of his hands do not then hover above the pad but rest on the pad and therefore give rise to dorsiflexion and possible repetitive strain injury. To this end, the pad incorporates in its structure a switch which is caused to close only when wrist pressure is exerted thereon, the closed switch acting to apply power to a warning device generating an audible, visible or vibratory warning signal. This signal acts to induce the operator to assume a proper wrist position hovering above the pad thereby avoiding dorsiflexion.