One hour of REM sleep might be okay if you're getting around 7 hours total sleep (as adults need 20-25% of sleep in REM, about 90 mins), but generally, 1 to 2 hours is ideal for memory, mood, and learning, with the body prioritizing REM when sleep-deprived. If you consistently get only 1 hour, you might be missing crucial brain restoration, impacting daytime function, though your body often makes up for it with more REM later if you're sleep-deprived.
Most adults need about two hours of REM sleep each night, which contributes to brain function, memory consolidation, and emotional health.
The amount of REM sleep you need depends on your age and the total time spent sleeping. If you're sleeping 7 to 9 hours per night (which is the recommended amount of sleep for a healthy adult), you need 60 to 120 minutes of REM sleep during that time. REM sleep usually makes up about 25% of total sleep time for adults.
You're likely not getting enough deep sleep due to stress, inconsistent sleep schedules, caffeine/alcohol, poor sleep hygiene (light/noise), certain medications, or underlying conditions like sleep apnea or anxiety, which fragment sleep, even if you're in bed for hours. Factors like aging, diet, and mental health also play roles in disrupting the restorative stages of sleep, preventing you from getting sufficient deep rest.
Short answer: Often yes -- one extra hour of sleep can meaningfully reduce sleepiness, improve cognitive performance and mood, and partially reverse homeostatic sleep pressure -- but benefits depend on timing, sleep stage, prior sleep debt, and individual sensitivity.
So no, having your eyes closed in bed does not count as sleep, but it's not like it's not beneficial either. Quiet wakefulness is an intermediary step for all of us to get to sleep on a healthy schedule, unless we are accustomed to being so exhausted we fall asleep within seconds of laying down.
Signs of poor core sleep (deep, restorative sleep) include waking up foggy, daytime fatigue/energy crashes, poor concentration, irritability, frequent illness, memory issues, and mood swings, indicating your brain and body aren't fully repairing and consolidating memories. You might also experience increased sugar cravings, slow muscle recovery, and a weakened immune system.
Difficulty concentrating: Trouble focusing on tasks or remembering details. Mood changes: Increased irritability, anxiety, or depression. Physical symptoms: Headaches and frequent illnesses. Sleep issues: Trouble falling asleep or staying asleep and waking up feeling unrefreshed.
A lack of deep sleep can be caused by not getting enough sleep overall, drinking alcohol, pre-bed caffeine, stress, health conditions like depression and Alzheimer's disease, and sleep disorders like insomnia and sleep apnea. We also get less deep sleep as we age.
The third and fourth stages are deep sleep. Though REM sleep was previously believed to be the most important sleep phase for learning and memory, newer data suggests that non-REM sleep is more important for these tasks, as well as being the more restful and restorative phase of sleep.
On average, Japanese sleep about 7 hours and 20 minutes a night, - the least among 33 OECD member countries. And the number of insomniacs is growing. But even as more people suffer from insomnia, help can be hard to find.
The 3-2-1 bedtime method is a simple sleep hygiene strategy: stop eating 3 hours before bed, stop working 2 hours before bed, and stop using screens (phones, tablets, TVs) 1 hour before sleep, helping your body transition to rest by reducing stimulants and digestive load for better sleep quality. A more detailed version adds 10 hours (no caffeine) and 0 (no snoozing) for a 10-3-2-1-0 rule.
The koala is the animal that sleeps approximately 90% of the day (20-22 hours), a necessity due to its low-energy eucalyptus diet requiring intensive digestion, making it the ultimate champion of sleep in the animal kingdom, followed closely by sloths and bats.
The 80/20 Rule means that you stick to your healthy, consistent sleep schedule 80% of the time. You then can make exceptions to your schedule 20% of the time. The 80/20 Rule allows you to “live life” and enjoy those special moments with your family.
However, there are a few things you can look for if you're worried that you're not getting enough REM sleep — foggy or groggy in the morning, lacking in energy during the day, feeling hungry often or gaining weight, don't feel like exercising, being forgetful,and irritable.
These findings are consistent with laboratory PSG studies that have evaluated the effects of exercise on REM/NREM sleep architecture, which have found that exercise reduces REM sleep and increases REM-L14,16,21,25,26.
Here are seven common signs that you may not be getting enough deep sleep:
The "3-2-1 bedroom method" isn't one standard thing, but often refers to either sleep hygiene rules (stop food/alcohol 3 hrs before bed, work 2 hrs before, screens 1 hr before) or creative floor plan solutions for small homes, like turning a sunroom into a bedroom or dividing a large room to get more sleeping areas, especially when adding a third bedroom is needed, focusing on clever layouts and dividing spaces efficiently.
The 3-3-3 rule for sleep is a technique to help manage anxiety and improve sleep quality. It involves focusing on three things you can see, three things you can hear, and moving three parts of your body.
In conclusion, this meta-analysis demonstrates that vitamin D deficiency is associated with a higher risk of sleep disorders in the population. Subgroup analyses further indicated that vitamin D < 20 ng/mL could increase the risk of sleep disorders.
This is sometimes described as a period of 'quiet wakefulness'. But is taking a quick rest - closing your eyes, putting your feet up and clearing your mind for a couple of minutes - as beneficial as getting some sleep? The concise answer is 'no'.
The 3-2-1 sleep rule is a simple wind-down routine: stop eating and drinking alcohol 3 hours before bed, stop working/mentally stimulating activities 2 hours before, and turn off screens (phones, TVs) 1 hour before sleep, helping you transition to rest by reducing stimulants and preparing your mind and body. It's often part of a larger 10-3-2-1-0 rule, which also adds no caffeine 10 hours prior and no hitting snooze (0) in the morning.
What are the signs of sleep deprivation?
11 tips to get more deep sleep and REM sleep at night