Herbie Murray
Sleep is an essential part of our daily lives, but it's still a relatively mysterious phenomenon. While most adults need seven or more hours of sleep each night, some people can function on just a few hours, while others need ten or more. The amount of sleep we need changes as we age, and can also be influenced by our genetics. Sleep is important for good health and well-being, and not getting enough can lead to physical and mental health problems. So, why do some people need less sleep than others?
| Characteristics | Values |
|---|---|
| Age | Newborns require 17 hours of sleep, school-age children require up to 12 hours, and adults require 7-9 hours |
| Activity level | More active people may require more sleep |
| Health status | People with sleep disorders may require more or less sleep |
| Circadian rhythms | Humans evolved to sleep in one consolidated block at night to avoid predators, conserve energy, and rest |
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What You'll Learn
Age
The amount of sleep a person needs varies depending on their age. For example, newborns sleep for most of the day, while older children sleep less. Teenagers tend to sleep later, and seniors go to bed earlier. The amount of sleep a person needs is also influenced by factors such as gender, activity level, and genes.
The National Sleep Foundation has conducted extensive research to determine the guidelines for how much sleep is required for specific age groups. For instance, babies aged zero to three months sleep 14 to 17 hours a day, partly because they are adjusting to the world after being in the womb for three trimesters. As children grow older, their sleep needs decrease. From one to two years of age, the recommended sleep range is 11 to 14 hours, and this further drops to 10 to 13 hours from ages three to five due to a slower growth rate.
It is essential to prioritise sleep and ensure that work or social activities do not interfere with getting adequate rest. Sleep has a significant impact on our daily lives and our physical and mental health. It regulates melatonin production, which in turn influences our moods, productivity, and eating behaviour. Additionally, sleep improves neurotransmitter concentrations in the brain, enhancing productivity, concentration, focus, and creativity.
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Activity level
It's important to note that the relationship between activity level and sleep needs can vary from person to person. Some highly active individuals may be short sleepers, requiring less sleep than average, while others may be long sleepers, needing more sleep to feel refreshed.
The amount of sleep a person needs can also change over time as their activity levels fluctuate. For example, a person who takes up a new exercise routine or starts a more physically demanding job may find that they need more sleep to support their increased activity level. Conversely, if a person's activity level decreases due to injury, illness, or a change in lifestyle, their sleep needs may also adjust accordingly.
Additionally, activity level can interact with other factors, such as age and health status, to determine an individual's optimal sleep duration. For instance, a physically active older adult may require more sleep than a sedentary younger person due to the combined effects of age-related sleep changes and increased physical activity.
Overall, activity level is a significant contributor to the variation in sleep needs among individuals. Understanding the relationship between activity and sleep can help people make informed decisions about their sleep habits and overall well-being.
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Health status
Sleep needs can vary dramatically from person to person. Your health status, activity level, and many other factors influence how much sleep you need. For example, newborns need 17 hours of sleep a day, while schoolchildren need up to 12 hours. The recommended sleep duration for adults is seven to nine hours. However, some people may be short sleepers or long sleepers due to a variety of reasons.
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Sleep disorders
Sleep needs vary from person to person, and a host of reasons can make some people short sleepers and others long sleepers. Activity levels, health status, age, and life stage can all influence how much sleep a person needs. For example, newborns require around 17 hours of sleep per day, while school-aged children may need up to 12 hours. The recommended sleep range for adults is generally between seven and nine hours per night. However, some individuals may require an hour more or less than this general range, depending on their circumstances.
It is important to note that sleep recommendations for newborns are not available due to the wide variation in sleep needs within this age group.
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Circadian rhythms
The 24-hour cycle of day and night is a feature of the planet that all species on Earth have had to evolve to survive and thrive on. Humans are no exception, and our circadian rhythms are the biological patterns that have allowed us to do this.
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Frequently asked questions
The amount of sleep a person needs is influenced by a variety of factors, including age, genetics, and individual circumstances. For example, newborns have very different sleep needs to adults.
The recommended sleep duration varies depending on age. Most adults need seven or more hours of sleep each night, with eight hours being the average.
Not getting enough sleep can lead to physical and mental health problems. It can also impact a person's ability to function during the day.
Good quality sleep involves getting enough hours of sleep, sleeping at the right time of day, and experiencing both REM (rapid eye movement) and non-REM sleep.
Yes, genetics can play a role in determining sleep patterns and the amount of sleep a person needs. Research is ongoing to understand the specific genetic changes that affect sleep and how this knowledge can be used to improve sleep health.
