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American Focus > Blog > Tech and Science > Why Do Some People Need Less Sleep? The Answer Lies in Our Genes. : ScienceAlert
Tech and Science

Why Do Some People Need Less Sleep? The Answer Lies in Our Genes. : ScienceAlert

Last updated: June 4, 2025 1:15 am
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Why Do Some People Need Less Sleep? The Answer Lies in Our Genes. : ScienceAlert
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Have you ever wondered why some people can function perfectly well on just a few hours of sleep, while others need a solid eight hours to feel rested? The mystery of why some individuals seem to require less sleep than others has long fascinated scientists. Let’s explore what we know so far about this intriguing phenomenon.

Natural short sleepers are a rare breed of individuals who can thrive on just four to six hours of sleep each night. These individuals, known as natural short sleepers, don’t feel tired, rarely nap, and don’t experience the negative effects of sleep deprivation like the rest of us. Researchers have identified genetic mutations in certain genes that seem to make their sleep more efficient, allowing them to get all the benefits of sleep in less time.

While natural short sleepers are a unique case, it’s important to note that most people who believe they are natural short sleepers are actually just chronically sleep-deprived. Factors such as long work hours, social commitments, and the glorification of productivity over rest can lead individuals to skimp on sleep, accumulating what is known as a “sleep debt.” This sleep debt can have detrimental effects on concentration, mood, performance, and long-term health.

To make up for lost sleep, many people attempt to catch up on weekends by sleeping in or taking naps. While this may temporarily reduce the negative effects of short sleep, it’s not a perfect solution. Weekend catch-up sleep may not fully offset the cardiovascular risks associated with chronic short sleep, and it can disrupt the body’s internal clock, making it harder to fall asleep on Sunday night.

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Ultimately, while some moderate catch-up sleep may offer temporary benefits, consistent, high-quality sleep throughout the week is essential for overall health and well-being. It’s important to prioritize sleep as a biological necessity rather than a luxury, as most individuals require seven to nine hours of sleep per night to function at their best.

So, was Margaret Thatcher a true natural short sleeper? While reports suggest she may have napped during the day to compensate for her minimal sleep at night, it’s hard to determine if she was a natural short sleeper or simply sleep-deprived. Sleep needs vary from person to person, influenced by factors such as age and underlying health conditions.

In conclusion, while some individuals may naturally require less sleep than others, most of us need adequate rest to function optimally. Prioritizing consistent, quality sleep is crucial for overall health and well-being. If you find yourself regularly skimping on sleep and relying on weekends to catch up, it may be time to reassess your sleep routine. After all, sleep is not a luxury – it’s a fundamental biological need.

This article is republished from The Conversation under a Creative Commons license. Read the original article for more insights on why some people need less sleep than others.

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