How many hours is too much sleep?
Ava Arnold
Updated on January 05, 2026
The “right” amount of sleep proves somewhat individual as some people will feel great on seven hours and others may need a little longer. However, in most studies and for most experts, over nine hours is considered an excessive or long amount of sleep for adults.
Is 15 hours of sleep a day too much?
People with hypersomnia might require as many as 10 to 12 hours of sleep per night to feel their best. Since day-to-day life might include responsibilities that don't allow for this much rest, long sleepers may feel excessively tired during the day and catch up on off days, sleeping as much as 15 hours at a time.Is sleeping 12 hours too much?
We often say that people need 7-9 hours of sleep, but some people require more sleep to feel rested. “Long sleepers” are people who regularly sleep more than the average person their age. As adults, their nightly length of sleep tends to be 10 to 12 hours. This sleep is very normal and of a good quality.What happen if you sleep too much?
When it comes to sleep, can you have too much of a good thing? It's true a good night's sleep is essential for health. But oversleeping has been linked to a host of medical problems, including diabetes, heart disease, and increased risk of death.Can too much sleep make you tired?
Research bears out the connection between too much sleep and too little energy. It appears that any significant deviation from normal sleep patterns can upset the body's rhythms and increase daytime fatigue.Can You Get Too Much Sleep?
Why am I sleeping 12 hours a day and still tired?
Characteristics of hypersomniaIn extreme cases, a person with hypersomnia might sleep soundly at night for 12 hours or more, but still feel the need to nap during the day. Sleeping and napping may not help, and the mind may remain foggy with drowsiness.
Why am I tired 2 hours after waking up?
Waking up feeling slightly groggy or tired is just part of the human experience. It's called sleep inertia: "The transitional state between sleep and wake, marked by impaired performance … and a desire to return to sleep." The main thing to know about sleep inertia is it is completely normal.Is it OK to sleep 10 hours a night?
How Much Sleep Is Too Much? Sleep needs can vary from person to person, but in general, experts recommend that healthy adults get an average of 7 to 9 hours per night of shuteye. If you regularly need more than 8 or 9 hours of sleep per night to feel rested, it might be a sign of an underlying problem, Polotsky says.Why do I still feel tired after 8 hours of sleep?
Most likely, you're still tired after eight hours of sleep because of these three factors: (1), you don't know your sleep need, (2) you're not taking into account your sleep efficiency, and (3) you carry sleep debt.What is long sleeper syndrome?
Long sleepers are people who regularly sleep more than other people of the same age. In adults, this typically means sleeping for more than 9 or 10 hours per night. Most long sleepers feel refreshed when they wake up from this extended sleep time.Why am I sleeping 14 hours a day?
Idiopathic HypersomniaThis sleep disorder is characterized by difficulty waking13, excessive sleepiness, and the inability to feel rested after sleeping at night or napping during the day. With this disorder, you may sleep as much as 14 to 18 hours a day.
Is it normal for a teenager to sleep 16 hours?
Most of the time, this is a perfectly normal aspect of adolescence. This sudden change in sleep patterns, even if it's perfectly normal, probably looks like a serious problem.Can you be addicted to sleeping?
While most experts agree that a straightforward sleep addiction is not a medical condition, it is possible to develop an addiction to sleeping pills. This can lead to symptoms of hypersomnia. “Sleeping pills can successfully treat short-term insomnia,” Bodiu says.How can I sleep for 8 hours in 3 hours?
There are a few things you can do when training your body to sleep less to help you get through short periods of sleep deprivation:
- Avoid Screen Time for an Hour Before Bed. ...
- Keep Screens and Other Distractions Out of Your Bedroom. ...
- Get Some Light Exercise. ...
- Make Sure Your Room is Dark. ...
- Avoid Alcohol. ...
- Reduce Caffeine Intake.