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Make sure your children go to bed at a set time and get enough sleep each night.
A FULL NIGHT'S SLEEP
Sleep needs vary, but here are the amounts typically needed nightly by people in different age groups.
Newborns: 16-18 hours
Preschoolers: 10-12 hours
School-age children: 9 or more hours
Adults: 7-8 hours
Source: National Heart, Lung and Blood Institute By Nanci Hellmich, USA TODAY
Parents, here's another good reason to make sure your kids get enough shut-eye: Children who get sufficient sleep are less likely to be obese, a new study shows. Other research shows sleep affects kids' academic performance, mood and attention span. For the latest study, scientists at the University of Chicago and the University of Louisville compared the sleep patterns of 308 children, ages 4-10, with their body mass index, a number that considers height and weight. The children wore special wrist-band devices for a week to track the amount they slept. Some of the kids had blood work done to look at their glucose, insulin, triglycerides and cholesterol levels, which are markers for the risk of type 2 diabetes and future cardiovascular disease
The study shows:
•Kids slept an average of eight hours a night. This is far less than the nine or more hours recommended for this age group.
•Kids who slept at least 9½ to 10 hours were the least likely to be obese or to have unhealthy blood work.
•The children who slept the least and had the most irregular sleep schedule (they didn't go to bed at a set time) had a substantially greater risk of being obese and having unhealthy blood work.
•Those who got caught up on sleep on the weekends somewhat reduced their risk of being obese or having unhealthy blood work.
•Obese children were less likely to get caught up on their sleep on the weekends.
"Good sleep routines and sleeping the right amount is the best healthy proposition," says lead author David Gozal, chair of the department of pediatrics at the University of Chicago.
About one-third of children and adolescents in the USA weigh too much, putting them at increased risk for type 2 diabetes, high cholesterol, sleep apnea and other health problems.Previous research shows that not getting enough sleep may contribute to weight gain partly because it affects hormones that control hunger and feeling full.
參考譯文：
要確保在規定時間內讓孩子們上床睡覺和得到充分的睡眠。
充分的睡眠
睡眠所需時間存在著一定差異性。下麵是不同年齡組的人每夜需要的睡眠時間。
新生人：16-18個小時
學前兒童：10-12個小時
學齡兒童：9個小時
成年人是7-8個小時。
數據來源於美國國家心肺血液研究所Nanci Hellmich。
父fu母mu親qin又you有you理li由you讓rang孩hai子zi們men早zao點dian上shang床chuang睡shui覺jiao了le。研yan究jiu表biao明ming，沒mei有you得de到dao充chong足zu睡shui眠mian的de孩hai子zi們men極ji易yi發fa胖pang。其qi他ta的de研yan究jiu也ye顯xian示shi，睡shui眠mian會hui影ying響xiang孩hai子zi們men的de學xue習xi能neng力li、情緒和注意力。芝加哥和路易斯維爾大學的科學家們所進行的最新研究對308個4-10歲sui兒er童tong的de睡shui眠mian模mo式shi和he考kao慮lv了le身shen高gao和he體ti重zhong的de身shen體ti質zhi量liang指zhi數shu做zuo了le比bi對dui。孩hai子zi們men戴dai了le一yi個ge星xing期qi的de特te殊shu的de手shou鏈lian裝zhuang置zhi以yi跟gen蹤zong他ta們men的de睡shui眠mian時shi間jian。有you些xie孩hai子zi要yao進jin行xing血xue液ye檢jian查zha以yi查zha看kan他ta們men的de血xue糖tang，胰yi島dao素su，甘gan油you三san酯zhi和he膽dan固gu醇chun水shui平ping，這zhe是shiⅡ型糖尿病的風險和未來心血管疾病的標誌。
研究表明：
1)孩子平均每晚睡覺八小時。這遠遠低於這個年齡組推薦的9個或更多的時間。
2)平均睡覺至少九個半小時至十個小時的孩子，幾乎沒有可能發胖或者有不健康的血液問題。
3)睡覺少和不規律（不在設定的時間內上床睡覺）的孩子有很大得肥胖症和不健康的血液問題的風險。
4)在休息日好好睡覺的孩子降低了他們得肥胖症和不健康的血液問題的風險。
5)發胖的孩子們一般不會在休息日好好睡覺。
芝加哥大學兒科部門的主任David Gozal說:"好的睡眠習慣和睡眠長度是最健康的因素"。
美國大約三分之一的兒童和青少年超重，這加大了他們患有Ⅱ型糖尿病、高血壓、失(shi)眠(mian)和(he)其(qi)他(ta)健(jian)康(kang)問(wen)題(ti)的(de)風(feng)險(xian)。前(qian)麵(mian)的(de)研(yan)究(jiu)表(biao)明(ming)沒(mei)有(you)得(de)到(dao)充(chong)分(fen)睡(shui)眠(mian)的(de)孩(hai)子(zi)們(men)之(zhi)所(suo)以(yi)體(ti)重(zhong)增(zeng)加(jia)，是(shi)因(yin)為(wei)睡(shui)眠(mian)影(ying)響(xiang)了(le)控(kong)製(zhi)饑(ji)餓(e)和(he)感(gan)覺(jiao)滿(man)腹(fu)的(de)荷(he)爾(er)蒙(meng)。
