ELIZABETH HENRY VIA GETTY IMAGES On Monday, the AA
睡眠は、大人にも子供にも大切だ。
大人は、1日8時間の睡眠をとるよう勧められているが（7〜9時間ほどだと考える専門家もいる）、子供の場合はそれほどシンプルではない。成長期の彼らは、体が常に変化しているからだ。
アメリカ小児科学会が6月13日に発表した、新たな睡眠ガイドラインは、子供の睡眠時間を考える上で助けになるかもしれない。このガイドラインは、アメリカ睡眠医学会が推奨する、睡眠時間に沿って作られた。両親や、子供の世話をする人たちには参考になるかもしれない。
生後4カ月〜18歳までの子供たちが必要としている睡眠時間は以下の通り。
・生後4〜12カ月：12〜16時間（昼寝を含む）
・1〜2歳：11〜14時間（昼寝を含む）
・3〜5歳：10〜13時間（昼寝を含む）
・6〜12歳：9〜12時間
・13〜18歳：8〜10時間
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睡眠不足による健康リスク
脳卒中のリスクが増大する(01 of08)
Even without the typical risk factors, like being overweight or having a family history, short sleep can up your risk for stroke, according to 2012 research. Adults who regularly slept fewer than six hours a night had four times the risk of stroke symptoms, HuffPost reported. (credit:Alamy)
肥満につながりやすい(02 of08)
Too little sleep can spur some less-than-ideal food choices, including serving yourself larger portions, and a hankering for junk food, thanks to some complicated hormonal changes that occur when you don\'t get sufficient shuteye. It seems that six hours of sleep or less bumps up production of the hunger hormone ghrelin and limits leptin, which helps you balance your food intake, according to a 2012 review of 18 studies of sleep and appetite. (credit:Shutterstock)
糖尿病のリスクが増大する(03 of08)
A pair of small studies from 2012 examined the link between poor sleep and insulin resistance, a telltale risk factor for diabetes. One found that among healthy teenagers, the shortest sleepers had the highest insulin resistance, meaning the body is not using insulin effectively, according to the National Institute of Diabetes and Digestive and Kidney Diseases. The second study examined fat cells, in particular, and found that cutting back on sleep increased insulin resistance in these cells, even when diet and calorie intake were restricted, Health.com reported. (credit:Shutterstock)
記憶力が減退する(04 of08)
You probably know that on the days when you are most tired, you\'re forgetful and unfocused -- but sleep deprivation can lead to permanent cognitive issues. The less we sleep, the less we benefit from the memory-storing properties of sleep. But additionally, a lack of sleep can cause \"brain deterioration,\" according to a 2013 study, which may at least in part explain memory loss in seniors. (credit:Alamy)
骨粗鬆症のリスクが増大する？(05 of08)
ラットの実験では、骨粗鬆症のリスクが増大するという結果が出ている。\n\nAt least in rats, long-term sleep deprivation seems to contribute to osteoporosis, according to a 2012 study. Researchers found changes to bone mineral density and bone marrow in the rodents when they were deprived of shuteye over a period of 72 days.\n\n\"If true in humans, and I expect that it may be, this work will have great impact on our understanding of the impact of sleep deprivation on osteoporosis and inability to repair bone damage as we age,\" Steven R. Goodman, Ph.D., editor-in-chief of Experimental Biology and Medicine, said in a statement. (credit:Shutterstock)
癌のリスクが増大する(06 of08)
A small (but growing) body of research suggests that short and poor sleep can up risk for certain types of cancer. A 2010 study found that among 1,240 people screened for colorectal cancer, the 338 who were diagnosed were more likely to average fewer than six hours of sleep a night. Even after controlling for more traditional risk factors, polyps were more common in people who slept less, according to the study.\n\nGetting just six hours of sleep a night has also been linked to an increase of recurrence in breast cancer patients. The study\'s author has pointed to more and better sleep as a possible pathway of reducing risk and recurrence. (credit:Shutterstock)
心臓病のリスクが増大する(07 of08)
The stress and strain of too little sleep can cause the body to produce more of the chemicals and hormones that can lead to heart disease, according to 2011 research. The study found that people who slept for six hours or less each night and have problems staying asleep had a 48 percent higher risk of developing or dying from heart disease. (credit:Shutterstock)
短命になる(08 of08)
睡眠時間が6時間より少ない人を14年間にわたって調べた調査によると、睡眠時間が長い人と比べて4倍短命だったという。\n\nIt\'s not just heart problems that can lead to sleep-deprivation-related death. In fact, short sleepers seem to die younger of any cause than people who sleep about 6.5 to 7.5 hours a night, TIME reported. A 2010 study examined the impact of short sleep on mortality and found that men who slept for less than six hours of sleep a night were four times more likely to die over a 14-year period. The study\'s authors called this link \"a risk that has been underestimated.\" (credit:Flickr:Life Mental Health)