Why You Can't Sleep in a New Place: The First-Night Effect Explained

Understanding the First-Night Effect

For many travelers, the first night in a hotel or a friend's guest room brings restless sleep. You toss, turn, wake frequently, and feel groggy the next morning. This common experience is known as the first-night effect, a phenomenon that sleep specialists have confirmed in numerous studies. Robinson Leoni, a sales director who travels frequently, describes his own struggles: at home he averages seven hours of sleep, but on the first night away, his smartwatch shows about five hours, even when he feels relaxed. "I feel normal, you know, no stress, nothing, but it's just I notice I wake up continuously," he says.

The first-night effect is not just a subjective feeling; it's a measurable change in sleep patterns. On average, people sleep 20 to 30 minutes less in a new environment, and the quality of that sleep is poorer. Researchers believe this response has evolutionary roots, serving as a protective mechanism when sleeping in unfamiliar and potentially dangerous surroundings.

The Brain's Vigilance

Anna Wick, a senior sleep researcher at the University of Freiburg in Switzerland, explains that the first-night effect is "assumed to be an adaptation response that the sleeping brain remains vigilant in this unfamiliar environment." This vigilance means that even while asleep, part of the brain stays alert, ready to respond to potential threats. Ahmad Mayeli, a psychiatry professor and sleep researcher at the University of Pittsburgh, likens this to the behavior seen in dolphins, where one hemisphere of the brain remains awake while the other sleeps. While humans don't go to that extreme, studies show that "part of the brain is sleeping less" during the first night in a new place.

Mayeli's research has focused on the frontal lobe, an area associated with the deepest stage of sleep. He found that this region is more active on the first night in a new environment, indicating a heightened sense of alertness. This means that not only do people sleep less, but they also sleep less deeply, which can leave them feeling unrested even if they manage to get a reasonable amount of sleep.

Age and Susceptibility

The first-night effect is not uniform across all age groups. According to Mayeli, the effect is more pronounced in children, adolescents, and older adults, and it typically worsens with age. Those in their 20s are the least affected, with Mayeli noting, "Maybe it's the sweet spot." This age-related difference may be due to changes in sleep architecture and brain plasticity over the lifespan. Younger adults may have more flexible sleep regulation, while older individuals may have more fragmented sleep overall, making them more susceptible to the additional disruption of a new environment.

The Role of Anxiety

Anxiety can also play a part in the first-night effect. Mayeli suspects that the brain is wired to be wary of new places because, historically, unfamiliar environments were the most dangerous to rest in. "It doesn't matter if it's a Marriott hotel or it's the savannah," he says. "Your brain hasn't gotten the memo that this place is completely safe." This evolutionary hangover means that even in the safest modern settings, our brains may still perceive a new environment as a potential threat, keeping us on edge.

Wick adds that evidence suggests the effect fades after the first night. Once the brain has had a chance to assess the new environment and determine that it is safe, sleep typically returns to normal. For most people, the second night in the same place is much better, which is why frequent travelers often develop strategies to cope with the first-night effect.

Practical Implications for Travelers

Understanding the first-night effect can help travelers manage their expectations and take steps to mitigate its impact. While there is no way to completely eliminate the brain's innate vigilance, there are strategies that may help. Maintaining a consistent sleep schedule, avoiding caffeine and alcohol before bed, and creating a relaxing bedtime routine can all promote better sleep, even in a new environment. Some people find that bringing familiar items from home, such as a pillow or a favorite blanket, can help signal to the brain that it is safe to relax.

For those who travel frequently, the first-night effect can be a recurring challenge. Leoni, who travels once or twice a month, has learned to accept that his first night away will likely involve less sleep. He uses earplugs and tries to stick to his usual bedtime routine, but he knows that his smartwatch will probably show a lower sleep total. Despite this, he finds that he can function normally the next day, suggesting that the effect, while noticeable, may not have a significant impact on daytime performance for most people.

Conclusion

The first-night effect is a fascinating example of how our evolutionary history continues to influence our modern lives. It serves as a reminder that our brains are still wired for survival, even in the comfort of a luxury hotel. By understanding this phenomenon, we can better prepare for the inevitable restless night when we travel, and perhaps find ways to ease the transition. As research continues, scientists hope to uncover more about the neural mechanisms behind this response, potentially leading to new strategies for improving sleep in unfamiliar environments.

This article is based on reporting by Medical Xpress. Read the original article.