Mr. Zhou, 67, had recently been struggling with sleep. "After turning off the lights, sleeping on my left side made my shoulder ache, sleeping on my right side made my chest feel tight, and lying flat made me feel like I wasn't getting enough air," he said. He tried changing his pillow and bedding, but nothing helped.

One night, he unconsciously raised his arms above his head, similar to the way people naturally stretch their waists. To his surprise, he slept soundly all the way until morning.

The next day, his wife found it unusual and said, "You slept with your hands above your head, and you didn't snore at all." Mr. Zhou himself was curious because the position felt remarkably comfortable. He later contacted his doctor to learn more.

Sleeping With Your Arms Above Your Head: Why Do So Many People Like It?

A sleep center conducted overnight respiratory monitoring on Mr. Zhou. The results showed that when lying on his back normally, his tidal volume (the amount of air inhaled and exhaled with each breath) was about 320 ml. However, when he raised his arms above his head, it increased to 430 ml. At the same time, the number of breathing interruptions dropped from 21 times per hour to just 7.

Doctors explained that during the day, many people spend long hours slouching or looking down, causing the intercostal muscles and chest muscles to tighten. The diaphragm is also pushed upward by the abdominal organs, limiting breathing primarily to the upper chest.

When a person sleeps with their arms raised, the shoulder girdle rotates upward and the ribs move forward, increasing the front-to-back diameter of the chest by about 1.5 centimeters. This gives the diaphragm more room to move downward, expands the lower lungs, improves gas exchange, increases blood oxygen levels, and reduces the likelihood of the brain being "awakened" by low oxygen levels.

It May Also Help Reduce Numb Arms

This sleeping position may also benefit the cervical spine and shoulder area.

A pillow that is too high or too low can strain the neck muscles and compress the brachial plexus, often leading to numbness in the arms during sleep.

When the arms are raised, the shoulder blades spread apart and the space between the first rib and the collarbone widens. This can reduce pressure on nerves and blood vessels, helping to relieve numbness and discomfort.

Not Everyone Is Suitable for This Position

Doctors caution that this position only feels comfortable if the shoulders are sufficiently flexible.

For people whose shoulder space is narrowed—commonly due to rotator cuff injuries or bone spurs—raising the arms more than 60 degrees may cause painful impingement. In some cases, the pain may even wake them up during the night.

Therefore, shoulder mobility is the key factor in determining whether this sleeping position is appropriate.

A Simple Self-Test

Stand with your back against a wall and place your arms flat against it. Slowly slide your hands upward.

If you experience pain, stiffness, or a feeling of blockage during the movement, you should avoid forcing your arms overhead while sleeping. Instead, try shoulder mobility stretches or use a "surrender-style" pillow, which is higher on both sides and lower in the middle. This allows the arms to rest naturally while keeping the chest open and reducing shoulder pressure.

Waking Up in the Middle of the Night: Does It Affect Sleep Quality?

During a follow-up visit, Mr. Zhou asked his doctor:

"I often wake up around 2 a.m. Although I fall back asleep quickly, it doesn't feel like I've slept through the night. Is there a way to sleep continuously until morning?"

The doctor explained that for healthy older adults, waking up once or twice per night is completely normal.

As long as:

• You fall back asleep within about five minutes,
• Your total sleep time is at least six hours,
• Deep sleep accounts for more than 15% of your sleep,

it is generally not considered insomnia.

What actually causes problems is lying awake in bed for long periods after waking up. If you spend more than 20 minutes tossing and turning, the brain can begin associating the bed with anxiety, making it even harder to fall asleep.

Three Ways to Fall Back Asleep More Easily

1. Keep a Fixed Wake-Up Time

No matter what time you go to bed, open the curtains and expose yourself to natural light at around 6:30 a.m. each day. This helps reset your biological clock.

After maintaining a consistent schedule for about three weeks, nighttime awakenings often improve naturally.

2. Schedule a Daily "Worry Time"

Set aside 15 minutes during the day to write down your concerns and possible solutions.

This reassures the brain that these issues have already been addressed, reducing excessive thinking at night.

3. Use a Sleep-Recovery Technique

If you wake up before it's time to get up, leave the bedroom and move to another room with dim lighting.

Practice diaphragmatic breathing:

• Inhale for 4 seconds while expanding your abdomen.
• Exhale for 6 seconds while gently pulling your abdomen inward.

You can also listen to repetitive, calming sounds such as rainfall.

Return to bed only when you feel sleepy again.

Avoid checking your phone or repeatedly looking at the clock, as these habits can make it harder to fall back asleep.