The Ultradian Rhythm involves working, reading, or studying for 1.5-2 hours and taking a 15-20 minute break. It is comparable to the pomodoro method, but with longer On/Off times.
It is a strategy that is supposed to help you access the flow state so you can maximize productivity and efficacy in your activities and avoid burnout.
Have you heard of this? Tried it? Would you? Does it work for you as advertised?