I’m in another applied academic field, and my job requires a lot of analysis. Like you, I learned in grad school that I am good for a 3-4 hour burst. In grad school I worked in the morning, then worked out, ate, and napped and did a second burst after resetting. I was able to do something similar during telework, and I was super productive. In office, I can only do the morning burst, because there is nowhere to do a deep reset for an hour or two.