Some people love breakfast and jump right out of bed full of energy, while others don't work that way.

Whether you're a morning person or not, you may wonder why you wake up tired in the morning even after getting enough sleep.

A sleep expert revealed some possible reasons, as well as tips on how to overcome them, writes Mind Body Green.

You have sleep inertia

Sleep expert and clinical psychologist Robin MacFarlane explains that sleep inertia is a transitional state between wakefulness and sleep, characterized by reduced performance, alertness and the desire to return to sleep, and claims that this is something that many struggle with. people.

While some people sleep inertia lasts only a few minutes, others feel it for more.

It's worth checking how long it usually takes you, so that in the morning you can give yourself tasks that are less mentally demanding.

"It's normal for some people to not feel well when they first wake up.

They will be like a 'zombie' for 20 minutes, regardless of whether they slept 12 hours or 2 hours.

Waking up in the middle of REM or slow-wave sleep also appears to worsen sleep inertia and lead to morning crankiness," the expert says.

You don't stick to your sleep schedule

Your body will appreciate it if you go to bed and wake up at the same time every day.

If you go to bed at 10pm one night and 1am the next, you'll mess up your internal clock and your body's circadian rhythm, which can lead to sleepiness upon waking.

A good tip is to set your alarm an hour before you plan to go to bed, so you can wind down and relax before going to sleep.

Your sleep quality is poor

Just because you spent 9 hours in bed, doesn't mean you slept well.

If you wake up frequently in the middle of the night due to, for example, your partner snoring or going to the bathroom, you won't be spending enough time in deep sleep to get quality rest, so it's not unusual to wake up to tired in the morning.

You drink alcohol before going to bed

Research has shown that alcohol before bed can disrupt the stages of deep sleep causing more awakenings during the night.

However, nicotine and caffeine also affect the amount of deep sleep.

The expert advises to reduce the intake of alcohol and nicotine before going to bed, if you want to have quality sleep.

Sleep too little or too much

If you wake up tired, it can also be a sign that you slept too little or too much the night before.

Everyone needs a different amount of sleep to feel their best, but seven to nine hours should be a healthy range for most adults.