Comment by mmatants

To add a data point, I used to do Pomodoro timing (25+5 min) but now switched to 15 min timer with a loose 2-5 min break. It's still hard to actually pull out of hyper-focus/anxious perseveration sometimes, but the shorter timer period seems to match my task cadence better. And the non-timed break just vibes better because it doesn't feel like punishment then.