This week I installed a program on my computer designed to remind me to get up, walk around, and take regular breaks from my work. I did this with the intention of reducing various negative effects that go with sitting too long. I was a little worried this would reduce my productivity a little, but it seemed worth a try.
Instead, with those regular breaks, my productivity has gone noticeably up this week.
I suspect there is something to be learned here.
I went with Workrave as my break program of choice. There are many, many others out there, though.