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Napping is a habit for many people, especially the elderly. The famous academician Zhong Nanshan is also accustomed to napping, he generally takes a nap for half an hour, and when he wakes up, he will feel energetic, which is conducive to work and life in the afternoon. Proper napping is indeed beneficial, but taking a nap for too long can easily lead to not being able to sleep at night.
But recently American scientists have discovered another downside to prolonged naps: triggering Alzheimer's disease, and they have found that as they age, older people take longer naps and nap more frequently. Higher frequencies and longer naps increase the risk of Alzheimer's disease, the study was published in the top journal Alzheimers & Dementia.
The researchers believe that the loss of neurons and neurotransmitters in the awakening-promoting neurons associated with tau tangles , one of the characteristics of Alzheimer's disease — leads to always not sleeping enough, as well as snoozing during the day.
Conversely, frequent naps during the day and excessive nap times can lead to rapid cognitive decline and entanglement of tau proteins, which in turn increases the risk of Alzheimer's disease.
Studies have shown that proper napping is no problem and can improve acute cognitive abilities and alertness. So how long is the best nap time? Many studies have shown that different nap times have different benefits, and the appropriate nap time is 6 minutes to 40 minutes, and should not exceed 60 minutes.
6 minutes of nap, help to strengthen memory, 10 to 15 minutes of nap, can wake up quickly, will not appear dizzy and other situations, 20 to 30 minutes nap is the best, 40 minutes of nap, also known as "NASA sleep", suitable for people who do not sleep well at night.
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—— TIMEPIE ——