... And water is wet. On the other hand, one can not mention this enough! To me, aches in my back are the indicator to stop spending all my time behind a desk

... And water is wet. On the other hand, one can not mention this enough! To me, aches in my back are the indicator to stop spending all my time behind a desk, and do some (light) exercise. About an hour of swift walking or cycling is all it takes to resolve the pain. If I manage to do this on a regular basis - i.e. daily or every other day - I never experience back issues, but it also improves my general well-being. Mens sana in corpore sano!