Twenty odd years ago (I can't believe it's been that long), trackballs were one of the first things I tried and I used one for a few years. But over the years,

Twenty odd years ago (I can't believe it's been that long), trackballs were one of the first things I tried and I used one for a few years. But over the years, I have come to approach ergonomics in terms of full body. Hand pain is a symptom of more than what my hands touch. How my legs and feet and shoulders and back feel changes how I sit and that changes where and how my hands are positioned. If my back is aching I shift my body, my shoulders and neck compensate, and that changes my elbows, wrists, and hands.