No. I haven’t tried longer sessions. I have tried 25 minutes (pomodoro) but that doesn’t work well for me. I have read about some research that says humans can focus only for 45 minutes to 1 hour maximum. Perhaps I could try 90 minutes work session. And I will let you know after trying.
After reading this blog, one of my colleagues tried this and told me he couldn’t work without checking something else (like mail) after few minutes. I told him to try for 20 minutes first and increase and adjust the time.
So you work for 90 minutes sessions. How many 90-hour sessions do you work per day?