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New Research Shows People Who Nap Frequently May Be More at Risk for High Blood Pressure
People who frequently take naps during the day may be more at risk for high blood pressure and strokes, according to new research.
A new study published Monday in an American Heart Association journal Hypertension, examined 360,000 participants who provided blood, urine and saliva samples, as well as detailed information about their lifestyles. Participants also self-reported whether they nap "never/rarely," "sometimes" or "usually."
Researchers found that adults who napped often were 12% more likely to develop high blood pressure and 24% more likely to have a stroke. But that doesn't mean the napping causes these health issues — instead, napping may be due to unhealthy behaviors. The researchers found that a high percentage of frequent nappers reported cigarette smoking, daily drinking, insomnia and other factors that could contribute to health-related issues.
Dr. Margaret Blattner, clinical instructor, department of neurology at Beth Israel Deaconess Medical Center, tells PEOPLE that habitual daytime naps can indicate problems with the quality of nighttime sleep or even overall health.
"Frequent or prolonged daytime naps can disrupt healthy nighttime sleep. Napping during the day may make it harder to fall asleep at night or cause nighttime sleep to become fragmented," Blattner tells PEOPLE. "Missing out on nighttime sleep — either because busy schedules don't allow sufficient sleep opportunity, or because of a problem with the quality of sleep itself — can cause severe daytime sleepiness."
Quality sleep is healthy and restorative for the body, Blattner says, so a change in sleep habits, either needing more sleep at night or naps during the day, might signal an underlying health problem.
"Often, prolonged naps are less restorative than more brief daytime naps, people often wake up unrefreshed or "groggy" after a long nap," she adds. "Additionally, long daytime naps take away time from other healthy things that people enjoy during the day: spending time with family, enjoying hobbies, and exercise."
When napping during the day becomes unpredictable, uncontrollable, or prevents an individual from accomplishing what they need or want to do, it could indicate a possible sleep disorder. Blattner suggests talking to a doctor if you're falling asleep unintentionally during the day, especially in settings like school, work, or while driving.
But Blattner assures that taking naps can also be beneficial.
"Napping is not always a cause for concern. Taking a nap can be refreshing and enjoyable," she says. "The key is, are you missing out on things that you enjoy because you are too sleepy to stay awake — that can indicate a problem — or does the nap help you get more out of your day."
"Taking a brief nap can feel restorative, reduce stress, and improve focus. Early afternoon is a good time to nap, as this aligns with a circadian dip in energy," Blattner continues. "However, napping too late into the afternoon or evening may impact nighttime sleep quality and make it harder to fall asleep."
注释：
Stroke：n
表示“中风”，means ““a sudden change in the blood supply to a part of the brain, sometimes causing a loss of the ability to move particular parts of the body”.如：I know a doctor. He is expert in curing stroke. 我认识一个医生,专治中风。
Hypertension：n
表示“高血压”，means ““a medical condition in which your blood pressure is extremely high.” 如：They claim that hypertension has numerous causes. 他们认为高血压有许多原因。
Urine: n
表示“尿”，means” the liquid that you get rid of from your body when you go to the toilet. 如：The bladder collects urine. 膀胱能储存尿液。
Saliva: n
表示“唾液”，means ““Saliva is the watery liquid that forms in your mouth and helps you to chew and digest food.”如： Saliva is secretion of the salivary glands. 唾液是唾液腺的分泌物。
Neurology：n
表示“神经学；神经病学”，means ““the study of the structure and diseases of the brain and all the nerves in the body”. 如：The study appears online in the journal Neurology. 研究发表于神经学期刊线上版。
Habitual: adj
表示“通常的；习惯性的”，means ““usual or repeated”如：Her pride was hurt, but her habitual control of manner helped her. 她的自尊心受到了伤害，但是她镇静自若的习惯帮助了她。
Prolonged: adj
表示“延续很久的，长期的”，means ““continuing for a long time”如：After prolonged discussion, the representatives hammered out a form of words that was acceptable to everyone. 代表们经过长时间的讨论之后，终于想出一种大家都能接受的措辞方式。
Fragmented: adj/adv
表示“支离破碎的，分裂的”，means ““consisting of several separate parts”如：Ownership of the large estates is increasingly fragmented. 这一大笔地产的所有权逐渐地四分五裂了。
Restorative: adj/adv
表示“有恢复作用的事物；使恢复精力的事物；促进健康恢复的事物”，means ““something that makes you feel better or more energetic if you are feeling tired or ill”如：Nature has an exhilarative and restorative effect.大自然具有使人畅快并恢复体力的效果。
Underlying: adj
1）表示“暗含的；深层的；潜在的”，means “real but not immediately obvious”如：The underlying assumption is that the amount of money available is limited. 隐含的假定是可用的资金有限。
2）表示“以…为基础的”，means “used to describe something on which something else is based”如：The underlying idea is an appealing one. 基础的概念是一种吸引人的概念。
Groggy: adj
表示“头晕的；昏昏沉沉的；酒醉的；摇摇晃晃的“， means" stunned or confused and slow to react (as from blows or drunkenness or exhaustion)", 如：The sleeping pills left her feeling very groggy. 那安眠药弄得她迷迷糊糊的。
Align: v
1）表示“排整齐；校准；（尤指）使成一条直线”，means ““to arrange sth in the correct position, or to be in the correct position, in relation to sth else, especially in a straight line”如：Could you align this table with those? 你能把这张桌子同那些桌子排成一行吗？
2）表示“使一致,结盟”，means ““to change sth slightly so that it is in the correct relationship to sth else”如：Our company should align ourselves with theirs. 我们的公司必须与他们的公司合作。
Circadian: adj
表示“（动植物的）昼夜的，约一日的，约24小时的（节律，周期）”，means ““used to describe the processes in animals and plants that happen naturally during a 24-hour period”如：Circadian rhythms show persistent, stable periodicities of about 24 hours. 昼夜节律表现出大约24小时的连续而稳定的周期性。
Dip：n
作名词，表示“（通常指暂时的）减少，下降，衰退”，means ““a decrease in the amount or success of sth, usually for only a short period”，如：a sharp dip in profits 利润急剧下降。
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