These are some cool data. I am currently gathering data on a small sample of emergency physicians to determine the relationship between sleep, overnight shift work and mood, among other things. We have not analyzed those data yet, but in a larger sample (from a commercial source), it appears that sleep duration has a prominent effect on mood.

Go to the link here to read more about the Jawbone data.

My question: is there an evolutionary explanation for the relationship between sleep duration and mood? Is it plausible that a bad mood from poor sleep is adaptive? Why?

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Joe Alcock

Emergency Physician, Educator, Researcher, interested in the microbiome, evolution, and medicine