how to sleep?

 How to calculate sleep efficiency:

The formula for calculating sleep efficiency is: (actual sleep time ÷ total time in bed) × 100%. It reflects the proportion of time you actually spent asleep in bed. The higher the value, the better the sleep quality. For example, if you lie in bed for 8 hours and actually sleep for 6 hours, your sleep efficiency is 75%.

An excellent website for calculating sleep efficiency

Components of sleep efficiency:

1. Total time in bed

It refers to the total duration from getting into bed to prepare for sleep to getting out of bed. For example, if you lie down at 11pm and get up at 7am, the total time spent in bed is 8 hours.

2. Actual sleep duration

The actual sleep duration refers to the time when one is truly asleep, after deducting the time spent awake due to difficulties in falling asleep, waking up during the night, etc. If one falls asleep 30 minutes after lying down and wakes up twice during the night for a total of 1 hour, the actual sleep duration = total time spent in bed - (time taken to fall asleep + time spent awake).

Factors affecting sleep efficiency

1. Difficulty falling asleep

If one cannot fall asleep within 30 minutes after lying down, the actual sleep time will be directly reduced.

1. Frequent awakenings during the night

Sleep is disrupted due to environmental disturbances (such as noise) or physical discomfort (such as nocturia).

2. Irregular work and rest schedule

Staying up late for a long time or catching up on sleep during the day may disrupt the biological clock and reduce sleep efficiency.

The significance of sleep efficiency

Assessing sleep quality: Efficiency of ≥85% is generally considered normal, while efficiency below 80% may indicate sleep issues.

Adjust sleep habits: Reduce ineffective lying in bed by optimizing the relationship between bedtime and sleep time.

Practical suggestions for improving sleep efficiency

1. Stick to a fixed routine

Go to bed and get up at the same time every day to strengthen the regularity of the biological clock.

2. Reduce ineffective bed rest

If you cannot fall asleep after lying in bed for 20 minutes, get up and relax to avoid prolonging your wakefulness due to anxiety.

3. Optimize the sleeping environment

Keep the bedroom dark and quiet, with the room temperature controlled at 18-22℃. The mattress and pillow should be moderately soft and hard.

4. Relax your body and mind

Avoid exposure to electronic screens one hour before bedtime, and relieve stress through meditation, reading, or listening to soft music.

5. Limit the duration of siesta

Take a nap of no more than 30 minutes during the day to avoid affecting the driving force of nighttime sleep.