re is a Chinese saying that "To go beyond is as wrong as to fall short." In other words, how long can you tap on that keyboard or sit in that chair before you hurt yourself. We’re not designed to remain as sedentary or perform the fine motor movements for the long uninterrupted hours that we have to do in so many of our jobs. Evidence suggests that prolonged abnormal posture and repetitive movements contribute to neck, limb and back pain. These conditions are collectively known as overuse syndromes, or repetitive stress injury (RSI).