Sleeping less and staying fit: what DNA could explain

While some individuals need a full night of uninterrupted sleep to feel rejuvenated, others can thrive on just a few hours of rest, brimming with energy from morning until night. You’ve bypassed the experience of sleeping in and carry no sleep debt. According to scientists, this might be a genetic gift—or curse.

A Genetic Mutation at Play

Your friends may view you as an alien, suspicious that you’re secretly taking an anti-sleep pill. They require multiple alarms to pry themselves from their cozy beds, groaning at each blaring ring. They tend to stretch their slumber into the morning, accumulating sleep like teenagers in their growing years. If they had the chance to be reincarnated, they would undoubtedly come back as groundhogs.

While everyone else snores, you’re busy being productive. Waking before dawn, you rise without a trace of dark circles under your eyes. Far from drifting in and out of sleep, you’re fully alert and ready for a hike or a marathon.

You’ve attempted to sleep longer, perhaps in an effort to satisfy medical advice, but to no avail. Waiting on your mattress for sleep to come feels almost torturous. Nevertheless, this nocturnal resilience carries its advantages. You recover easily from sleepless nights and consistently wake up before your alarm, while others struggle to stay awake despite a few cups of coffee.

This uniqueness, which has aided you through your academic years and late-night gatherings, is indeed a rarity. You belong to a minuscule segment of the population (between 1% and 3%) that requires only six hours or less of sleep. Within scientific circles, you’re even dubbed a “short sleeper.” The reasoning behind this phenomenon? A genetic mutation.

Too Much Sleep Can Be Detrimental

We often hear that we must sleep for a full eight hours each night to maintain good health, but the reality is more complex. Researchers have found that some individuals are naturally wired to function on less sleep, thriving despite it. This sheds light on why you buzz with energy while others drag their feet.

Dr. Ying-Hui Fu and her team have identified rare genetic mutations that influence our internal clocks, known as circadian rhythms. For example, some individuals possess variations in a particular gene that enable them to operate seamlessly on just six hours of sleep, without experiencing fatigue or negative health effects. Even rarer cases exist where people can manage on just four hours nightly.

However, it’s essential to note that these cases are exceptional. Just because many people sleep less doesn’t mean they emerge unscathed. For the vast majority of us, reducing sleep can lead to adverse consequences, even if we feel we can “power through.”

A Note on Generalization

While certain individuals seem predisposed to waking early without suffering throughout the day, this is still the exception rather than the rule. It’s a superpower of the human body, but far from the norm. You might be a “morning person” yet find yourself fighting off sleep during a mid-afternoon show or struggling to keep your eyes open at your desk.

In a society that often labels night owls as lazy and praises early risers with the emergence of “miracle mornings,” those wellness routines that commence at dawn can bring about guilt for waking up at eight. In an attempt to conform to this societal pressure, we impose rigid schedules on ourselves, ignoring our bodies’ responses. Our survival mode leads us to believe we are invincible.

Midday fatigue, irritability, trouble focusing, and uncontrollable cravings are all signs our bodies communicate; it’s crucial that we listen. Even “short sleepers” must pay attention to these indicators to differentiate between fleeting energy and lasting equilibrium. Instead of striving to replicate idealized routines, the objective should be to discover our personal rhythms. The right pace allows us to rise effortlessly, endure the day without exhaustion, and drift off to sleep seamlessly.