[MengerSponge]

It's hard to stay in-focus for 8 hours without amphetamines. I find that I have to eat and pee and stretch now and again.

But I've had trouble with 25 minutes being a bit too short for some more technical tasks. Is there any literature about optimal work durations for highly abstract tasks? Programming architecture, super complicated mechanical cad, some physics or math calculations...

It takes a long time to load the model into your working memory, so restarting a lot is very painful. Is it better to actually follow the pomodoro model and do 25/5? Or is 50/5 more productive? Maybe 50/10 or 40/5? A few professions get the autonomy to control their work at that level of granularity, and we'd love more guidance than "do what works best for you, bb."