why do you feel tired after sleeping too much
в The average person needs 7. 5 hours of sleep and goes through five sleep cycles per night (the 5th is REM). в It's hardest to wake up from sleep cycles three and four. в If you sleep more than you need to you're probably going to wake up from a later sleep cycle, meaning you'll feel groggy and tired even though you've slept more. It's the weekend and you can't wait to sleep in; it's been a long week and a good 10 hours of sleep will do you wonders, right? Wrong. According to sleep specialist and author of "The Power of When,",
more sleep isn't always better for you. To understand why this is, we need to look at sleep cycles and how much sleep the average person needs. Breus says that most people need 7. 5 hours of sleep the revered eight hours is just a myth. Here's where that number comes from: The average person goes through five sleep cycles per night. Each one of those cycles is approximately 90 minutes long.
Five cycles of 90 minutes each translates to 450 minutes in total which works out to be about 7. 5 hours. However, Breus says that it's not just the hours of sleep that matter, but also which sleep cycle you wake up from. "The stage of sleep that you wake up in is the one that has the biggest effect on what I call a sleep hangover," he says. There's stage one, two, three, four, and REM. According to Breus, stages one and two are the easiest to wake up from, REM is slightly more difficult, and then stages three and four are the hardest. When you sleep an extra hour or two more than you normally do, chances are you're going to wake up from the REM cycle, or cycles three or four, which means you're going to feel groggier. This also explains why taking a short power nap is more effective than taking a longer nap. Longer naps will force you to wake from one of the later sleep cycles, leaving you feeling more tired than rested.
Breus recommends napping for just a short 25 minutes instead. So even if you feel tired enough to sleep forever, stick with the number of hours you need instead. "If I give people one piece of advice, it's stick to one sleep schedule, period, end of story," Breus says. "That will be the most effective in not only helping you fall asleep but to get the good quality sleep you're looking for. " Studies have shown that sleeping too long or not enough each night can increase the risk for diabetes. Sleeping too much or too little could make you weigh too much, as well. One recent study showed that people who slept for nine or 10 hours every night were 21% more likely to become obese over a six-year period than were people who slept between seven and eight hours. This association between sleep and remained the same even when food intake and were taken into account.
For some people prone to, sleeping longer than usual on a weekend or vacation can cause head pain. Researchers believe this is due to the effect oversleeping has on certain neurotransmitters in the, including serotonin. People who sleep too much during the day and disrupt their nighttime sleep may also find themselves suffering from in the morning. There was a time when doctors told people suffering from to head straight to bed. But those days are long gone. You may not even need to curtail your regular when you are experiencing back pain. Check with your doctor. Doctors now realize the health benefits of maintaining a certain level of activity. And they recommend against sleeping more than usual, when possible. Although is more commonly linked to than oversleeping is, roughly 15% of people with depression sleep too much. This may in turn make their depression worse.
That's because regular sleep habits are important to the recovery process. The Nurses' Health Study involved nearly 72,000 women. A careful analysis of the data from that study showed that women who slept nine to 11 hours per night were 38% more likely to have coronary heart disease than women who slept eight hours. Researchers have not yet identified a reason for the connection between oversleeping and disease. Death. Multiple studies have found that people who sleep nine or more hours a night have significantly higher death rates than people sleeping seven to eight hours a night. No specific reason for this correlation has been determined. But researchers found that depression and low socioeconomic status are also associated with longer sleep. They speculate these factors could be related to the observed increase in mortality for people who sleep too much.
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