I don't see the problem, then, with biphasic sleeping?
I've adapted it an hour ahead to suit my housemates' eating habits, I don't see any problem in adjusting it according to how you like it. I personally feel a larger gap between nap and sleep may be helpful as this seems to be my most productive time so far, but it's only been a week. Then again, any later than 3am is probably pushing it...
As an update - I'm getting better at this! The nap feels quite out of place and I'm not really tired when it comes to it, but I'm tired when I get up instead. Getting up after 3 hours sleep is HARD. This is the first time I've had problems with actually getting up. I've noticed that my eating habits are DIRECTLY correlated to this. Not so much what I eat, but how much. Eating lighter, in general, makes this so much easier. And less sugar. Much less sugar...
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