Sleep-deprived Koreans' average sleep time is in the 5-hour range - Korea Sleep Tech Survey

According to the '2025 Korea Sleep Report' published by sleep tech company A-Sleep, Koreans spend an average of about seven hours a day in bed, but their actual sleep time is only 5.59 hours.
This is more than an hour short of the 7-9 hours recommended by the Korean Society of Sleep Medicine. The average sleep efficiency, which indicates the percentage of time spent asleep relative to the time spent lying down, was 85%.
The average time it took them to fall asleep was 18 minutes, well below the normal 20 minutes.
Looking at the proportion of sleep stages, the proportion of time spent awake is 9.22%, followed by REM sleep (when brain activity is activated) at 1.28%.
Overall, the results were within the normal range: 20.43% were in the dream stage, 54.99% in light sleep, and 15.34% in deep sleep.
A-Sleep says, "The sleep structure of most Koreans is normal, but absolute
"They are in a chronic state of sleep deprivation, with insufficient sleep time," he explained. Changes in sleep quality can also be seen by season. REM sleep increases sharply, sleep efficiency decreases in summer, and sleep environment improves in autumn.
The study was conducted between January 1 and December 31, 2024, and included data from 246,934 people collected using A Sleep's AI (artificial intelligence) sleep measurement technology.
It is an analysis of sleep data.