That's true for me as well. When I was a student, revising (and memorising bits that needed to be memorised) was almost always a form of holding a book and walking in circles. Or around the house.

I now spend as much time walking around the office as I do cranking code or writing on my desk. Over the years, I started recognising other habitual pacers in the department. We joke about forming a society and lobbying for a pacing room.