Unfortunately, that's
not true. If you can, pay back your sleep debt in a
timely fashion.
Make up for any lost sleep
as soon as possible. Sleep loss is cumulative. If
you lose several hours on a given night, you will
become more and more sleepy in the ensuing days,
even though you get your "normal" sleep. So pay
back your sleep debt.
But remember: You cannot
replace lost sleep at once. When you sleep longer
to catch up, try to do so by going to bed earlier
than usual. You cannot make up for large sleep
losses during the week by sleeping in on the
weekends. A nap during the day can help you pay
back your sleep debt. The important rule is to
return to your regular sleep schedule as soon as
possible.
Source: Power Sleep
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