The "first-night effect" is a documented sleep disturbance where individuals experience decreased sleep quality and duration when sleeping in an unfamiliar environment. Research from the University of Freiburg and the University of Pittsburgh indicates this phenomenon is an evolutionary survival mechanism, causing the brain to remain partially vigilant in new surroundings, often resulting in 20 to 30 minutes less sleep.
Why the Brain Stays Alert in New Places
The brain’s inability to fully relax in a new location is likely an evolutionary holdover. According to Ahmad Mayeli, a psychiatry professor and sleep researcher at the University of Pittsburgh, the human brain remains wary of new environments because, historically, these locations posed the highest survival risks.
"Your brain hasn’t gotten the memo that this place is completely safe," Mayeli said. His research reveals that the frontal lobe—the area associated with deep sleep—remains more active during the first night in a new space. This creates a state of heightened alertness. Mayeli compares this to the sleeping patterns of dolphins, noting that while not identical, "studies show part of the brain is sleeping less."
Anna Wick, a senior sleep researcher at the University of Freiburg, confirms that this is an "adaptation response" where the sleeping brain prioritizes vigilance over rest.
Who Is Most Affected by Travel Insomnia
While the first-night effect is widespread, its intensity varies by age. Research indicates that the phenomenon is most pronounced in children, adolescents, and older adults. According to Mayeli, individuals in their 20s appear to be the "sweet spot," experiencing the least disruption.
Beyond evolutionary biology, psychological factors play a significant role. Lisa Strauss, a psychologist specializing in cognitive behavioral treatment for sleep disorders, notes that baseline anxiety levels often dictate how poorly someone sleeps. For these individuals, the first-night effect can become a self-fulfilling prophecy; worrying about the inability to sleep creates the very stress that keeps them awake.
Even if someone does not feel stressed, their brain may be monitoring its surroundings. Ahmad Mayeli says most people experience this effect, and even those who may not notice it probably do on a small level, sleeping about 20 to 30 minutes less on average in a new environment.
Environmental and Behavioral Triggers
Not every restless night is caused by evolutionary vigilance. Strauss points out that external factors often exacerbate the issue. A flashing smoke alarm light, an uncomfortable hotel bed, or relational tension during a trip can prevent deep sleep.
Conversely, some travelers may experience better sleep on the first night if they are physically exhausted from travel or if the location provides a psychological "disconnection" from their daily stressors at home. People who typically suffer from chronic insomnia at home may even find that a new environment provides a reset, as they do not yet associate the new bed with their history of sleep difficulties.
Strategies for Improving Sleep in New Environments
While the first-night effect is a natural response, experts offer strategies to mitigate its impact:
- Arrive Early: If an upcoming meeting or event is high-stakes, Mayeli suggests arriving a day early to allow the brain to acclimate to the environment.
- Maintain Routines: Strauss recommends practicing consistent sleep hygiene, such as keeping a cool, dark room and following a regular bedtime routine, starting several days before the trip.
- Create Familiarity: Bringing personal items like a favorite pillow or blanket can help signal safety to the brain.
- Visualization: For those prone to anxiety, Strauss suggests visualizing a safe, familiar environment or repeating calming phrases, such as: "May you know that you are safe. May you know that you are loved. May you be at peace."
Frequently Asked Questions
Is the first-night effect permanent?
No. According to Anna Wick, the effect typically fades after the first night as the brain adjusts to the new environment.
Should I be worried about losing sleep on the first night?
According to Ahmad Mayeli, there is no cause for concern. Most people can easily recover from missing an hour or two of sleep for a single night.
Why do older adults struggle more with sleep in new places?
Research indicates the first-night effect worsens with age, meaning children, adolescents, and older adults are more susceptible to this increased brain alertness than those in their 20s.
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