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“It has to do with what your personal need is and everyone has a different need.” “There’s not a magic number that someone has to adhere to,” she says. The study, which was conducted in the United Kingdom, used data from 88,000 adults to determine that 10 p.m. We ask sleep disorders expert Colleen Lance, MD, who discusses if timing matters and offers tips for getting better sleep. PolicyĪ recent study suggests that going to sleep at 10 p.m. We do not endorse non-Cleveland Clinic products or services. Advertising on our site helps support our mission. To help, check out a few of these commonly asked questions, so you can find the right sleep schedule for you.Cleveland Clinic is a non-profit academic medical center. However, a sleep calculator can’t answer all of your specific questions. Sleep Calculator FAQĪ sleep calculator is a great tool to use when you’re trying to optimize your sleep and overall health. What matters are your individual sleep needs and what makes you feel the most rested. Some people feel more rested with a few extra hours of sleep while others find that a minimum of seven hours is perfect for them. These guidelines are great to keep in mind but don’t feel limited to them. For instance, infants may need up to 17 hours of sleep while adults can settle for about seven hours of sleep each night.Īccording to the CDC, this is the general amount of sleep each age group needs for optimal health: Age The older you get, the less sleep you need. How much sleep you need changes as you age. This paralysis is a protective measure to ensure you don’t harm yourself by trying to act out your dreams. Atonia is a temporary paralysis of the muscles, with the exception of eyes and breathing muscles. During this stage, brain activity picks up and the body experiences several changes including rapid eye movement, increased heart rate, fast breathing, and atonia. Stage four is also known as rapid eye movement (REM) sleep. You spend an average of 20–40 minutes in this stage, but it gets shorter as the night goes on as you spend more time in REM sleep. Not only that, but this stage is critical for overall health as it can also aid the immune system and other key bodily functions. Stage three is known as deep sleep, where the body further relaxes and restores itself to help with growth and recovery. In this stage, it’s harder to be woken up by external stimuli and it lasts about 10–16 minutes. At the same time, your brain activity changes and eye movements stop. Once you’ve entered stage two, your muscles relax, your body temperature drops, and your breathing and heart rate slow. The body soon follows, with occasional movements like twitches. During this time, the sleeper hasn’t fully relaxed their body, but the brain starts to slow down and lightly changes in activity associated with falling asleep. Stage one is often referred to as the transition stage and lasts only one to five minutes. Each stage is determined by the brain activity while you sleep, which shows distinct patterns that identify a specific stage. One for rapid eye movement (REM) and the other three that form non-REM (NREM) sleep. Later cycles will range from 90 to 120 minutes, but the composition of each cycle will change as the night goes on.

The first sleep cycle you go through is usually the shortest, ranging from 70 to 100 minutes. It’s typical for your sleep cycles to change as you progress through a night’s worth of sleep.

However, not all sleep cycles are the same length and vary depending on different factors such as age, sleep patterns, and personal preferences. On a typical night, the average person goes through four to six sleep cycles that last around 90 minutes each. There are four total stages in a sleep cycle, each lasting a different amount of time. Sleep cycles are the stages your body goes through each night as you snooze. Although sleep duration is important, it’s also critical to focus on your sleep cycle. Contrary to popular belief, the amount of time you spend sleeping doesn’t guarantee a good night’s rest.