This is very reassuring to me, as I have exactly that pattern and was concerned by that. Not any more!!! I’m just one of the commoners. My experience actually says a single segment of sleep has lower quality than two segments, and the second segment is more important than the first
We often worry about lying awake in the middle of the night – but it could be good for you. A growing body of evidence from both science and history suggests that the eight-hour sleep may be unnatural.
In the early 1990s, psychiatrist Thomas Wehr conducted an experiment in which a group of people were plunged into darkness for 14 hours every day for a month.
It took some time for their sleep to regulate but by the fourth week the subjects had settled into a very distinct sleeping pattern. They slept first for four hours, then woke for one or two hours before falling into a second four-hour sleep.