The video raises the idea that “not sleeping deeply” means “not getting enough sleep” and discusses sleep stages and recovery. Sleep-stage measurements are different from how rested a person feels and from the total time spent asleep.
Sleep moves through several stages in cycles
The U.S. National Heart, Lung, and Blood Institute (NHLBI) explains that sleep alternates between REM and non-REM sleep. Non-REM sleep has three stages. Deep sleep is the third stage of non-REM sleep, and its share can decrease with age. A cycle lasts about 80–100 minutes, and several cycles generally occur in one night.
“Not sleeping deeply” is not a diagnosis
Sleep stages are classified using brain signals and eye movement during a sleep study. A reading from a consumer device, or data from one night, should not be treated as a diagnosis. Other patterns to notice include difficulty falling asleep, waking often, strong daytime sleepiness, or recurring sleep problems that disrupt daily activities.
Habits to consider and when to seek help
The National Institute on Aging (NIA) recommends a consistent sleep routine and a quiet, comfortable bedroom. It also advises avoiding caffeine, alcohol, large meals and late-evening naps. If problems persist, or there is loud snoring, gasping for breath or daytime sleepiness that affects safety, consult a healthcare provider to discuss possible causes. Do not start sleep medication on your own.
Watch the original video
See the original video on YouTube.