Summary of “Why Six Hours Of Sleep Is As Bad As None At All”

Subjects in a lab-based sleep study who were allowed to get only six hours of sleep a night for two weeks straight functioned as poorly as those who were forced to stay awake for two days straight.
This sleep deprivation study, published in the journal Sleep, took 48 adults and restricted their sleep to a maximum of four, six, or eight hours a night for two weeks; one unlucky subset was deprived of sleep for three days straight.
In the last few days of the experiment, the subjects who were restricted to a maximum of six hours of sleep per night showed cognitive performance that was as bad as the people who weren’t allowed to sleep at all.
Getting only six hours of shut-eye was as bad as not sleeping for two days straight.
Another sleep study published in Epidemiology, indicates people generally overestimate their nightly sleep by around 0.8 hours.
If you think you sleep seven hours a night, as one out of every three Americans does, it’s entirely possible you’re only getting six.
Even just a little bit of sleep deprivation, in this case, six rather than eight hours of sleep across two weeks, accumulates to jaw-dropping results.
Fixing bad sleep habits to get enough sleep is easier said than done.

The orginal article.