Getting a full night of deep, restful sleep is a struggle. From waking up in the middle of the night to having trouble falling asleep, figuring out the perfect nighttime routine to lull you into sleep is crucial to wake up fully rested. One element that may be throwing off your sleep schedule is what time you go to bed. According to Apple Watch data published in the Apple Heart and Movement Study from 2025 (via Axios), the average American bedtime is 11:37 p.m.

But when is the best time to go to bed for optimal sleep? According to science, 10 p.m.

Researchers in the United Kingdom found that study participants who consistently went to bed at 10 p.m. reported the lowest risk of cardiovascular disease. Those who went to bed between 10:00 p.m. and 10:59 p.m. reported lower incidence than those who went to bed between 11:00 p.m.–11:59 p.m., and after 12:00 a.m.

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Dr. Emma Lin, a board-certified pulmonologist and sleep medicine specialist and the co-founder of AimVein, tells Upworthy that the body starts preparing you for sleep even earlier.

"Around 9 to 10 p.m., the production of melatonin begins in the brain. This is the hormone that gives your body the signal that it is time to go to sleep," she says. "The body temperature drops. The heart beats slower. The breathing becomes rhythmic."

By then, the body is perfectly prepped for a good night of sleep.

"When people go to bed at 10 p.m., they sleep better and faster. Their bodies breathe better," says Dr. Lin. "Most people wake up feeling refreshed. Going to bed at this time corresponds to the body’s natural rhythm."

Woman wearing a sleeping mask asleep in bed by 10 p.m.Photo credit: Canva

Of course, going to bed at 10 p.m. may be way too late or totally unrealistic for some people. In that case, Dr. Lin stresses that what's most important is going to bed at the same time every night.

"Your body loves the same routine every day. This is what I always tell my patients. The brain works like a clock. If the clock doesn’t go to bed and wake up at the same time every day, it will be confused," she explains. "But if the clock goes to bed at the same time every day, it will know when it’s time to slow down. The melatonin will be released on schedule. The breathing will calm down. Patients with insomnia and sleep apnea will see an improvement in their sleep pattern just by having the same bed time every day."

The goal is to sleep 7–9 hours each night, which is recommended by the National Sleep Foundation. Dr. Lin adds that this amount of sleep allows the body and brain to recover completely.

Woman struggles to sleep on her phone.Photo credit: Canva

"Sleeping is cyclical. Some phases are good for the immune system. Others are good for memory. Deep phases are good for allowing the lungs and heart to rest, she says. "When people get less than 7 hours’ sleep, I see increased daytime sleepiness, increased levels of stress hormones in the body, and increased breathing difficulties in people with breathing problems like asthma or lung disease when they get inadequate sleep. Adequate sleep allows the body to heal itself."

So, if you are looking to go to bed at 10 p.m. (or a time that will be consistent for you to hit the 7-9 hours), Dr. Lin suggests you avoid these two things to get good sleep: "Exposure to bright light can turn the brain’s internal clock back. Using electronic devices at night suppresses melatonin," she says. "And drinking alcohol can exacerbate breathing problems at night. I tell all my patients that sleep is not a lazy activity. Sleep is a healing activity."

One of the fun things about traveling to different countries is that you not only get to learn about other cultures, but you also learn some things about your own. Americans who travel abroad often learn that people around the world appreciate them for being open, friendly, and good at spreading hope and optimism.

On the other hand, people in other countries can often tell when an American is coming from a mile away because they speak loudly, whether indoors or outdoors. Americans also have a very peculiar body language and are known to lean on things when they have to stand for an extended period.

A Reddit user posed a question in the AskReddit subforum to learn more about how Americans stand out abroad: What's an "obvious" sign that someone is American? The post received more than 35,000 responses, with an overwhelming number of commenters noting that Americans are all smiles and love to make small talk, something most people appreciate.

"An Italian told me that Americans walk confidently in the wrong direction."

"Been taught to walk fast, and look worried.. People think you know what you're doing."

"I worked as a cashier in a tourist place in Paris, I always recognised Americans because they were kinda friendly to me and they always left tips."

"I guess there are worse things than friendly and generous."

"If someone asks how far away something is, an American will tell how you long it takes to get there as opposed to a physical distance."

"It actually pisses off some Americans to give a distance in miles, unless they're calculating gas mileage. In some places, you have to give with and without traffic options. I think it's more valuable info in time than in distance."

"The gentle grins you give to strangers if you make eye contact with them as you pass by, at least in the Midwest. was not well received in Germany."

"I dated a European man here in the US. When we walked together, every time I made eye contact with someone on our path I would smile at them, and they would always smile back. Boyfriend was so confused at all these strangers smiling at me. Kept asking if I knew all these people. It was hilarious."

"How much personal space they give themselves. Americans like at LEAST an arm's length."

"We're conditioned to fill spaces evenly. I noticed when i worked delivery, spending lots of quality time on elevators that for every new person that enters, everybody shuffles to even things out. Similar thing plays out in social gatherings and bars. Not sure if that's universal or not, but I find it interesting. I think the size of our personal bubbles is because our spaces are generally much larger because we've got the space (heh) to build bigger buildings, sidewalks, roads etc. Might also explain why we're louder. Used to filling larger spaces with volume."

Body language expert Joe Navarro says that among Americans, the social zone for acquaintances and casual interactions is four to 12 feet, while family and close friends stand 1.5 to four feet apart. The intimate zone, for those closest to us, ranges from the skin to about 18 inches.

"According to the CIA, when training to be a spy, you have to unlearn how to lean. Americans tend to lean on things when standing still."

All of this is true, according to Jonna Mendez, the former chief of disguise at the CIA, who has shared some of her tips and tricks for making Americans seem more European. "So we would de-Americanize you," Mendez told NPR. "They think that we are slouchy, a little sloppy. And they think that they can almost see that in our demeanor on the street........

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