It's very difficult, often, to make the effort and stop in the middle of work to take a break.
You might have got nicely into the flow of it, or you might just want to get it over and done with. But the reality is that if you have been working for a long period without stopping, you have tightened, shortened, forgotten to breathe, and lost awareness of your legs.
The Alexander Technique teaches you to stop.
Stopping and releasing, coming back to your whole self from that little sphere of your head, can not only refresh you enormously, but can also prevent actual physical damage. Just taking a few moments to do the 'inner stretch', to lengthen and widen and rest your hands, can allow you to go back to work as an integrated, complete self. ( In contrast to just being a head stuck on a pole)