> Break my concentration EVERY 20-30 minutes to move around for at least 2 minutes? That's at least halving my productivity. I approximately never need to focu

> Break my concentration EVERY 20-30 minutes to move around for at least 2 minutes? That's at least halving my productivity. I approximately never need to focus to the level that standing up and pacing a bit would evict state, let alone need to focus like that for for over a half hour at a time. And I think if I was focusing like that, I'd probably just forget to take a break.