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For years, many have taken the “8-hour rule” of nightly rest as gospel. Yet, despite faithfully clocking in those hours, countless women report feeling exhausted come morning. If this sounds familiar, you’re not alone — and science is beginning to explain why.
What the Research Says
Experts have turned to objective tools like wearable sleep trackers and polysomnography (which monitors brain activity, movement, and breathing) to study sleep differences between men and women. Large-scale research offers some surprising findings:
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Women, on average, sleep 20 minutes longer each night than men.
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A 2022 global study that included nearly 70,000 people using wearable trackers found that women across all age groups slept slightly more each night. In those aged 40–44, the difference ranged from 23 to 29 minutes.
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Another study published in the journal Sleep revealed women averaged 19 minutes more sleep than men and spent more of their night in deep, restorative sleep (23% of the time, compared to men’s 14%).
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Interestingly, men’s sleep quality declines more with age, but women’s does not show the same drop.
The Paradox: Longer, Yet Poorer Quality Sleep
Despite sleeping longer and spending more time in restorative sleep stages, women are more likely to report poor sleep quality and are diagnosed with insomnia at higher rates than men. So what’s behind this disconnect?
The Multifactorial Roots of Women’s Sleep Struggles
Sleep is influenced by far more than just bedtime hours:
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Biology: Differences begin at puberty and shift dramatically during pregnancy and menopause, driven in part by hormone fluctuations.
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Health Conditions: Disorders that disrupt sleep — like iron deficiency and thyroid issues — are more common in women.
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Mental Health: Higher rates of depression, anxiety, and trauma in women make it harder to wind down and sleep soundly.
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Social Roles: On average, women perform nine more hours a week of unpaid care work (from childcare to emotional support) than men. This leaves fewer opportunities for daytime rest or relaxation, increasing dependence on nighttime sleep for recovery.
It’s About More Than Minutes
While women may “clock in” extra sleep compared to men, life’s demands often mean they wake up less rested. Experts stress that sleep needs are highly individual — there’s no universal formula based solely on gender or age.
“More than sleep, it is about the space to get rest, more support throughout the day, and more recognition of how their bodies and minds interact with a world that often expects too much from them”.
Disclaimer: This article is for informational purposes only and is based on research summarized from reliable sources. It does not constitute medical advice. Individuals should consult a healthcare professional for personalized recommendations regarding sleep and health concerns.
