For the study, very short sleep patterns were defined as less than five hours a night, short sleep was five to six hours a night, standard sleep was seven to eight hours, and long sleep was nine or more hours a night.
Study subjects who had less than seven hours of sleep were at greater risk than those who got eight hours of sleep a night.
According to the National Institutes of Health, most adults need seven to eight hours of sleep a night.
About 45% of adolescents ages 11 to 17 get less than eight hours of sleep a night, even though teenagers need between nine and 10 hours.
WSJ: How Much Sleep Do Children and Teenagers Need? Grown-Up Problems Start at Bedtime
The app sets goals for you according to World Health Organization guidelines, like eight hours of sleep a night and 10, 000 steps a day, and shows the average met by most Up users.
Finally, make sure that you are getting at least seven to eight hours of sleep, as there has been considerable research in the last five years on the effect of getting too little sleep on obesity.
CNN: Best way to jump-start your metabolism after a plateau?
An aerospace engineer and Navy veteran who earns his living designing rockets, Hodge makes sure to sleep eight hours per night.
Abroad, she could spend eight hours in the saddle and sleep soundly out of doors.
In a nutshell, if you sleep for eight hours a night go to work and find yourself lolling and drooling on the keyboard, you aren't getting enough.
BBC: NEWS | UK | Magazine | Why should we have eight hours' sleep?
The AMD Z-60 APU comes loaded with features designed to enhance the tablet experience, including AMD Start Now technology that allows fast boot and resume from sleep times1, up to eight hours of battery life while Web browsing, and up to six hours of HD video playback2.
When it comes to sleep, getting those seven to eight recommended hours just may not be feasible.
Flights longer than eight hours require a relief pilot on board to take over when pilots sleep.
CNN: Dutch 737 pilot locked out of cockpit while co-pilot sleeps
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