Many people have heard the general recommendation that adults should get 7 to 9 hours of sleep each night. While this guideline is a helpful starting point, sleep needs are not exactly the same for everyone.
The amount of sleep you need depends on many factors, including your age, activity level, health status, stress levels, work demands, and daily habits. Someone training for a marathon may need more sleep than someone with a sedentary lifestyle. A new parent may struggle with sleep quantity due to nighttime awakenings, while a person recovering from illness may require additional rest.
Sleep recommendations are not one-size-fits-all. Understanding how lifestyle affects sleep needs can help you determine what amount of rest allows you to feel and function at your best.
General sleep recommendations vary by age:
These ranges represent averages, but individual sleep needs can vary based on lifestyle and health factors.
Exercise is one of the best ways to improve sleep quality, but higher levels of physical activity may also increase your body's need for recovery.
During sleep, your body:
People who engage in intense physical activity—such as endurance training, competitive sports, or heavy resistance training—may benefit from more sleep than someone with lower activity demands.
Athletes often require closer to 8–10 hours of sleep to maximize recovery and performance.
Mental and emotional stress can significantly influence sleep requirements.
During periods of high stress, the body releases hormones such as cortisol that help regulate the stress response. While these hormones are helpful in short bursts, chronic stress can interfere with sleep quality.
People experiencing ongoing stress may need more sleep because:
Stress can also create a cycle where poor sleep increases stress, and stress makes sleep more difficult.
Work demands can have a major impact on both sleep duration and quality.
People who work overnight shifts or rotating schedules often experience disruption to their circadian rhythm, the body's internal clock that controls sleep and wake patterns.
Shift workers may experience:
Because their sleep is often less efficient, some shift workers may need additional time in bed to achieve adequate recovery.
Jobs that require heavy physical labor may increase recovery needs.
Construction workers, healthcare workers, first responders, and others with physically demanding roles may benefit from prioritizing longer sleep opportunities.
Sleep is also essential for cognitive performance.
People with demanding careers may need adequate sleep to support:
A lack of sleep can affect work performance even when someone feels they have adapted to being tired.
Pregnancy creates significant physical and hormonal changes that can affect sleep.
During pregnancy, many people experience:
While recommended sleep duration does not dramatically increase for all pregnant individuals, many may need additional rest because sleep quality becomes more disrupted.
Prioritizing sleep during pregnancy supports maternal health, fetal development, and overall well-being.
New parents often experience a major reduction in uninterrupted sleep.
Newborns typically wake frequently for feeding and care, making it difficult to achieve long stretches of sleep.
During this stage, the focus may shift from achieving a specific number of hours to:
Although sleep disruption is temporary, chronic sleep deprivation can affect mood, attention, and overall health.
Nutrition and sleep are closely connected.
Poor nutrition may affect sleep by contributing to:
People who are under significant nutritional stress, recovering from illness, or engaging in intense training may need more sleep to support healing and recovery.
Sleep needs change throughout life.
Young people need more sleep because their bodies and brains are actively developing.
Sleep supports:
Adults often balance work, relationships, exercise, and responsibilities that can affect sleep opportunities.
Lifestyle choices become especially important for maintaining consistent sleep.
Older adults may not necessarily need significantly less sleep, but they often experience changes such as:
Maintaining healthy habits can help support restorative sleep with aging.
Lifestyle habits may not always change the number of hours you need, but they can affect how restorative your sleep is.
Caffeine can remain in the body for several hours and may make it harder to fall asleep or achieve deep sleep.
Although alcohol may make some people feel sleepy initially, it can disrupt sleep later in the night and reduce sleep quality.
Bright screens in the evening can interfere with melatonin production and delay the body's natural sleep signals.
Your body often provides clues that you are not getting enough rest.
Signs you may need more sleep include:
Feeling "used to" being tired does not necessarily mean you are getting enough sleep.
Instead of focusing only on a specific number, consider how you function during the day.
Ask yourself:
Your ideal sleep amount is the amount that allows you to feel alert, healthy, and productive.
Needing more sleep than usual or feeling exhausted despite adequate sleep may indicate an underlying issue.
Talk with a healthcare provider if you experience:
Conditions such as sleep apnea, insomnia, thyroid disorders, anemia, and other medical issues can affect sleep quality.
The recommended number of hours of sleep is a guideline—not a strict rule. Your ideal sleep duration depends on your age, lifestyle, activity level, stress, health, and daily demands.
While most adults function best with 7 to 9 hours of sleep per night, some people may need more or less depending on their circumstances. Athletes, people under high stress, those recovering from illness, and individuals with disrupted sleep schedules may require additional recovery time.
The goal is not simply to spend more time asleep—it is to achieve enough high-quality sleep to support your body, brain, and overall health.
If you are consistently tired despite getting enough sleep, experiencing changes in your sleep patterns, or struggling with daytime fatigue, talk with your healthcare provider or a sleep specialist. Understanding your unique sleep needs is an important step toward better health and quality of life.
If someone you know is struggling with sleep, please click the orange button below to take a free online sleep test and talk with one of our sleep health professionals.