Comment by alok-g
+1
Interruptions are 'breaks' that clear your context memory by drawing it to something else entirely.
An activity like lunch, shower, etc., actually help by giving you moments to ruminate thoughts related to the deep work at hand, help capture the bigger picture and innovate.
I am a respected technologist and am credited with more than 100 inventions. Practically none of those came to me when I was at my workstation. Breaks that are not interruptions can be so good that one should purposefully mandate them into schedule.