If you’re a heavy computer user, you’ll know that there are hazards that come with the job. Number one is the ‘operator shoulder’, where your shoulders ache from hunching over the screen for too long. Another is ‘mousing mitt‘ (I just made that up) where your hand starts aching from too much mousing around the desktop. If you’re really unlucky and don’t take care you can even end up with RSI or at least a preliminary version.