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Your sleep plays one of the crucial roles in the functioning of essential processes in the body. Sexual activity, especially orgasm – both with a partner and alone – has a proven sedative effect. However, the precise mechanisms behind this effect are not yet fully understood. Researchers at the Central Queensland University in Australia studied the connection between sex and the quality and duration of sleep. Their findings were published in the journal Sleep Health.
The Global Sleep Issue
Sleep deprivation is a growing problem worldwide, and research shows that nearly a third of the global population suffers from insufficient sleep. According to the U.S. Centers for Disease Control and Prevention (CDC), over 72% of adults get less than 7 hours of sleep. And the situation is worsening over time. Additionally, a global survey conducted in 2024 found that only 13% of people reported sleeping well every night.
Sleep issues are associated with numerous diseases, including mental disorders, cardiovascular and metabolic diseases, and weakened immune function. Lack of sleep impacts all aspects of daily life: productivity, decision-making, and even the risk of accidents. Sleep deprivation also worsens mood, increases anxiety, and generally causes emotional instability.
Study Design
The study, conducted in South Australia, involved 14 healthy participants (7 heterosexual couples). All were aged 18 or older and had sex more than once a week. Participants kept a sleep and sexual activity diary and also recorded objective sleep metrics. They were observed for 11 nights, during which they completed a questionnaire noting sexual activity: sex with a partner, masturbation, or no sexual activity. Couples who did not engage in sex maintained their usual pre-sleep behavior. During solo sex, participants slept individually in separate rooms.
To monitor objective metrics, participants wore headbands equipped with sensors to measure physiological sleep parameters. In the morning, they recorded their motivation and readiness for the day using a 100-point scale. They also assessed the alignment of sleep stages to determine how sexual activity with a partner impacted their sleep stage synchronization.
The Impact of Sexual Activity on Your Sleep
Researchers found that sexual activity – both solo and with a partner – led to improved sleep quality: it became longer, and there were fewer awakenings during the night. Women, in particular, slept longer and had fewer periods of wakefulness after both partner and solo sex.
Sexual activity has several biochemical advantages that contribute to relaxation and deeper sleep. These effects are caused by key hormones released after sex and orgasm – oxytocin and prolactin. They also lower cortisol levels. These hormonal changes create a calming effect, which helps transition into deeper, more restful sleep.
[We] revealed significant correlations between orgasm intensity and subjective sleep quality, readiness and motivation for the next day.
Study authors
The release of prolactin after orgasm was also associated with greater sexual satisfaction and improved sleep. Overall, sleep quality was significantly better during partner sex compared to no sex, especially in terms of time to fall asleep and nighttime awakenings.
Interestingly, REM (rapid eye movement) phase synchronization was longer when participants slept with a partner, regardless of whether sexual activity occurred.
Although the sample size was small and other factors, such as relationship strength and satisfaction, were not accounted for, this study suggests that sexual activity can be a simple and effective way to improve sleep quality. For people struggling with sleep issues, this non-pharmacological approach could offer a valuable alternative to medication or sleep aids.
It is also important to remember that both your sleep, arousal, and orgasm are heavily dependent on your overall well-being. Any difficulties, especially in the intimate sphere, do not contribute to sexual desire and can hinder a good night’s sleep. Professionals at the Lior Medical Center can help you maintain your health and, if necessary, address existing issues. You can learn more and schedule an appointment by calling +380 73 200 6198 or via this number on Telegram.
