I found a beautiful New York Times article on writing by Bill Hayes. I've excerpted only a small paragraph but if curious, I've included the link.
On Not Writing by Bill Hayes
To be a writer is to make a commitment to the long haul, as one does (especially as one gets older) to keeping fit and healthy for as long a run as possible. For me, this means staying active physically and creatively, switching it up, remaining curious and interested in learning new skills (upon finishing this piece, for instance, I’m going on my final open-water dive to become a certified scuba diver), and of course giving myself ample periods of rest, days or even weeks off. I know that the writer in me, like the lifelong fitness devotee, will be better off.