I used to work for long stretches, especially in an office, but now I know that when I get tired the solutions get further and further away. I can take a break

I used to work for long stretches, especially in an office, but now I know that when I get tired the solutions get further and further away. I can take a break from programming, get something else done (cook, clean, nap, exercise) and come back to it later and work 10x more efficiently. I actively try not to work for too long at a stretch.