
Sleep is a bodily process that allows your body to rest, repair and restore itself. While the amount of sleep a person needs varies according to age, health, and lifestyle, most adults need seven to eight hours of sleep each night. Lack of sleep has been linked to many health issues, and can affect your body's systems and restorative functions.
| Characteristics | Values |
|---|---|
| Purpose | Allows the body to rest, repair and restore itself |
| Amount | Varies by age, health, and lifestyle |
| Lack of sleep | Linked to health issues |
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What You'll Learn

Sleep is a body process that allows your body to rest, repair and restore itself
Feeling tired even after a full night's sleep can be confusing, but it may be due to factors such as previous sleep loss, poor sleep quality, or disturbances to your body's natural sleep-wake cycle. If this becomes a frequent occurrence, it is recommended to consult with a healthcare provider to rule out any underlying medical conditions. Poor quality sleep can worsen health and mental health conditions, fuelling a cycle of sleeplessness. Therefore, it is important to evaluate your sleep needs and ensure you are getting the rest your body requires.
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Sleep needs vary by age, health, and lifestyle
Sleep is a body process that allows your body to rest, repair and restore itself. You need sleep to function properly. Sleep needs vary by age, health, and lifestyle. For instance, if you are pregnant, sick, or recovering from an injury or surgery, you’ll need more sleep. Infants and children need more sleep than adults. Most adults need 7 to 8 hours of sleep each night, according to the American Academy of Sleep Medicine. However, some people can get by with less sleep, and this may be genetic. For example, some people can inherit the trait of being a “short sleeper” from a parent.
Personal circumstances and your health status can also affect how much sleep you need. Health and mental health conditions can contribute to sleep deprivation. Poor quality sleep can also worsen these conditions and fuel a cycle of sleeplessness. The occasional night of poor sleep generally won’t seriously impact your health. However, if you are feeling tired even after sleeping for 8 hours, it may be due to factors such as previous sleep loss or disturbances to your body’s natural sleep-wake cycle. If this becomes a frequent occurrence, you may want to consult with your healthcare provider to rule out any underlying medical conditions.
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Lack of sleep is linked to many health issues
Sleep is a body process that allows your body to rest, repair and restore itself. You need sleep to function properly. Lack of sleep has links to many health issues.
The amount of sleep you need depends on your age, health, and lifestyle. Adults need seven or more hours per night, according to the American Academy of Sleep Medicine, although this can vary. For example, if you are pregnant, sick, or recovering from an injury or surgery, you will need more sleep. Similarly, infants and children need more sleep than adults.
Feeling tired even after sleeping for eight hours can be confusing, but it is often due to factors such as previous sleep loss, poor sleep quality, or disturbances to your body's natural sleep-wake cycle. Poor quality sleep can also worsen health and mental health conditions and fuel a cycle of sleeplessness.
If feeling tired after what feels like a good night's sleep becomes a frequent occurrence, you may want to consult with your healthcare provider to rule out any underlying medical conditions.
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Poor quality sleep can worsen health conditions and fuel a cycle of sleeplessness
Sleep is a body process that allows your body to rest, repair and restore itself. You need sleep to function properly. Lack of sleep has links to many health issues. Poor quality sleep can worsen health conditions and fuel a cycle of sleeplessness.
Sleep needs vary by age, health, and lifestyle. For example, if you are pregnant, sick, or recovering from an injury or surgery, you'll need more sleep. Infants and children need more sleep than adults. The amount of sleep you need may also be genetic. For instance, some people can inherit the trait of being a "short sleeper" from a parent.
Feeling tired even after sleeping for 7 to 8 hours can be due to previous sleep loss, poor sleep quality, or disturbances to your body's natural sleep-wake cycle. If you frequently feel tired after a good night's sleep, you may want to consult a healthcare provider to rule out any underlying medical conditions.
To improve your sleep quality, consider evaluating your sleep needs. Ask yourself: Do I feel rested after 7 hours of sleep, or do I need at least 8 or 9? Too little sleep can affect your body's systems and restorative functions, so it's important to ensure you're getting the right amount of sleep for your individual needs.
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Sleep needs can vary within the same age group
The American Academy of Sleep Medicine recommends that adults get seven or more hours of sleep per night. However, the hours of sleep a person needs vary by age, health, and lifestyle. Most adults need seven to eight hours of sleep each night.
Feeling tired even after sleeping for eight hours can be confusing, but it is often due to factors such as previous sleep loss, poor sleep quality, or disturbances to your body's natural sleep-wake cycle. If feeling tired after what feels like a good night's sleep becomes a frequent occurrence, you may want to consult with your healthcare provider to rule out any underlying medical conditions.
The key thing to keep in mind is how you feel when you get various amounts of sleep. Ask yourself: do I feel rested after seven hours of sleep, or do I need at least eight or nine? Too little sleep can affect your body's systems and restorative functions.
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Frequently asked questions
According to the American Academy of Sleep Medicine, adults need seven or more hours of sleep per night. However, this can vary depending on age, health, and lifestyle. For example, if you are pregnant, sick, or recovering from an injury, you may need more sleep.
Sleep is a body process that allows your body to rest, repair and restore itself. Lack of sleep has been linked to many health issues.
Variations in how much sleep people need can be genetic. For example, some people can inherit the trait of being a "short sleeper" from a parent. Personal circumstances and health status can also affect how much sleep you need.























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