His recommendation is that sleep cycles typically happen in 4 hour intervals so it's best to sleep 4 or 8 hours a night.
Getting up int he middle of a sleep cycle is often as bad as getting less than 4 hours of sleep.
And going to bed drunk is the worst for your sleep cycle.
What about those 90 minute cycles that are also commonly cited in popular sleep-advice? Those wouldn't work into a 4hour schedule.
Are you referring to those sleep cycles where you have 4 90 minute naps a day instead of sleeping once at night?
I'm not the subject matter expert, so I don't want to speak authoritatively:)
Their latest research indicates that a full sleep cycle lasts approximately 4 hours, which does fly in the face of the older sleep data.
it's entirely possible that their hypothesis will turn out to be incorrect.