How much do you sleep each night?
The National Sleep Foundation says the average adult needs seven to nine hours of sleep each night.
But sleep can be more important than just keeping you alert during the day.
A study from UC-Berkley found couples who were sleep deprived had fewer feelings of appreciation for their partner.
Even if only one partner slept poorly, both partners felt less appreciated in the relationship.
And a recent study from Sweden showed sleep deprivation raises levels of molecules associated with brain tissue loss. The molecules are generally only seen in those with brain damage.
That's something to think about the next time you’re up late.
Research from the National Sleep Foundation also found those who exercise regularly sleep substantially better than those who do not.
This effect was seen from vigorous exercisers to those whose exercise was simply walking.