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by INTPenis 870 days ago
I did this at community college ~15 years ago. So I'm mostly improvising regarding my cycle being that long. I'd say it's around 60 minutes.

Specifics don't matter after a while because you build new habits and do them without thinking.

But the thing our teacher told us was to stay up until you get more and more tired, until you feel your eyelids wanting to close, but power through it and measure the time between the most tired and the most alert after that.