Is the #polyphasic sleep schedule a secret to a better life? Matt Walker breaks down the #claims and #realities in this #eyeopening video. Discover more here:

Our recent preprint on the effects of the Uberman polyphasic sleep schedule: We saw a >95% decrease of growth hormone after 5 weeks of radically polyphasic sleep, but less severe effects on sleep structure or cognition.

Also posted separately, but: after your interesting exploration of various kinds of polyphasic sleep, I’d be interested to hear your take on the historically attested “second sleep” phenomenon… (essentially biphasic sleep but entirely within hours of dark).

Your book changed my life. Thanks, Matt Walker sharing valuable information.

Very interesting,thank you for sharing.