Why it's tough to get up in the morning

How come some people spring out of bed in the morning and others hit the alarm over and over before getting up? There are several explanations, explains sleep expert Carl Brazil, M.D., Ph.D.

You may not have slept long enough. Your body wants to get the sleep you need, so if your alarm starts going off too close to when your head hit the pillow, it may be a struggle, Dr. Bazil says.

You may be waking up during your deepest sleep. If you're forced awake during the deepest stage of sleep, you may be groggy, whereas you'll more easily awaken at the end of a 90- minute sleep cycle ( you can get to know more in detail in "Sleep stages" ) sometimes even if total sleep time is less). 

You're waking up at the wrong time. Your body wants to follow a consistent sleep schedule. If you try to shift that timing too much (by trying to wake up a lot earlier than usual). it may be tough to pop out of bed.

You may be an extreme night owl. For the majority of individuals, our body clocks run on roughly the same schedule, where we tend to have more energy in the morning and feel ready for sleep later in the day. But about 15 to 30 percent of people are believed to have either biologically delayed or faster- than - usual- running body clocks ( thought to be the result of our genes). 

You may have sleep apnea or another sleep disorder. If you give yourself adequate time to sleep and have a consistent sleep schedule yet still seem to be struggling a lot to wake up in the morning (or feel particularly drowsy during the day ), it might mean you have sleep apnea or another sleep disorder that's preventing you from getting enough deep sleep each night , Dr. Bazil says