Quick answer
Sleep and sexual desire may be related, but desire has many influences, including physical health, medications, stress and relationships. Getting enough sleep supports general well-being; it is not a guaranteed way to change anyone’s interest in sex.
Yawnder’s original 2015 post discussed a news article about sleep and desire. Below we look at the underlying study and the limits of its findings.
What the 2015 study found
The pilot study by Kalmbach and colleagues followed 171 women recruited in a U.S. university setting. Participants, who were not taking antidepressants, completed daily online reports for 14 days about sleep and sexual response.
Longer reported sleep was associated with greater next-day desire. Each additional hour was associated with 14% higher odds of partnered sexual activity the next day. That is a relative change in odds in this sample—not a 14-percentage-point increase in probability, and not a guarantee that adding an hour of sleep will produce that result.
The arousal findings were more nuanced: longer average sleep was associated with better reported genital arousal across participants, while a longer night than usual was associated with lower next-day genital arousal. The study used self-reports and observed associations; it did not establish cause and effect.
What the results do—and do not—mean
The findings suggest a reason to study sleep as one possible influence on sexual response. They cannot determine why an individual’s desire changes, establish the effect for every gender or relationship, or predict whether someone will want sex after a particular night’s sleep.
Changes in desire are not automatically a problem. If a change is distressing to you, possible contributors include health conditions, stress, medication effects, pain, relationship dynamics and sleep difficulties. A clinician can help explore them without assuming a single cause.
Practical steps
- Allow enough time for sleep and keep a routine that works with your schedule.
- Discuss concerns openly and respectfully with a partner; desire and boundaries can change.
- Talk with a healthcare professional if persistent sleep difficulties, pain or a change in sexual function is concerning.
- Do not stop or change a prescribed medication without speaking with its prescriber.
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Explore sleep guidesFrequently asked questions
Does an extra hour of sleep increase the chance of sex by 14%?
The study reported 14% higher odds associated with an additional hour in its sample. Odds are not the same as probability, and the observational study did not show that adding sleep causes that change.
Did the study include everyone?
No. It followed 171 women recruited from a university setting who were not taking antidepressants. The findings may not generalize to everyone.
Is low desire always caused by poor sleep?
No. Desire varies naturally and can be influenced by many factors. Seek individualized advice if a change is distressing.
Can better sleep guarantee better sexual function?
No. Adequate sleep supports health, but it cannot guarantee a particular response or replace evaluation of a concerning symptom.