时间:2019-02-03 作者:英语课 分类:2007年VOA标准英语(二月)


英语课
By Carol Pearson
Washington, D.C.
13 February 2007
 
watch Sleep report

Children who do not get enough sleep are often irritable 1 and unable to concentrate in school.  But now a new study suggests lack of sleep could also contribute to the epidemic 2 of childhood obesity 3 in many countries.  VOA's Carol Pearson has more on that study and other research connecting sleepiness with obesity.


kid sleepingIf children got to bed earlier and woke up later, fewer kids would be overweight. That is the conclusion of a newly published study on children and sleep. 


The study was conducted at Northwestern University. It followed more than 2,000 children from three to 18 years of age.


Researchers weighed the participants then checked them again five years later. The children or their parents kept sleep journals.


The researchers found children who slept less weighed more than those who got more sleep. Children who had just one extra hour of sleep each night were 20 percent less likely to be overweight five years later.  Later bedtimes play a greater role in overweight children between 3 and 8 years of age, while earlier waking times play a greater role in the weight of children aged 4 8 to 13.


Experts recommend that children under five get 11 to 13 hours of sleep each night; that children five to 12 get 10 to 11 hours of sleep, and that teenagers get nine hours.


Other research shows a connection between lack of sleep and the hormone 5 that causes hunger.  In this study, where volunteers had their sleep curtailed 6, the hunger hormone, ghrelin, rose 24 percent.


Professor Eve Van Cauter at the University of Chicago says, "You're more hungry, even if you have the same amount of food.  And so you're more likely to over-eat and thus gain weight."


Both studies agree with what sleep specialist Dr. Beth Malow at Vanderbilt University has found: "This research is consistent with prior studies, it's relatively 7 new, and it's really applicable for people of all ages."


The studies suggest sleep, at least more of it, could reduce the risk of being overweight and the medical problems that accompany weighing too much.




adj.急躁的;过敏的;易怒的
  • He gets irritable when he's got toothache.他牙一疼就很容易发脾气。
  • Our teacher is an irritable old lady.She gets angry easily.我们的老师是位脾气急躁的老太太。她很容易生气。
n.流行病;盛行;adj.流行性的,流传极广的
  • That kind of epidemic disease has long been stamped out.那种传染病早已绝迹。
  • The authorities tried to localise the epidemic.当局试图把流行病限制在局部范围。
n.肥胖,肥大
  • One effect of overeating may be obesity.吃得过多能导致肥胖。
  • Sugar and fat can more easily lead to obesity than some other foods.糖和脂肪比其他食物更容易导致肥胖。
adj.年老的,陈年的
  • He had put on weight and aged a little.他胖了,也老点了。
  • He is aged,but his memory is still good.他已年老,然而记忆力还好。
n.荷尔蒙,激素,内分泌
  • Hormone implants are used as growth boosters.激素植入物被用作生长辅助剂。
  • This hormone interacts closely with other hormones in the body.这种荷尔蒙与体內其他荷尔蒙紧密地相互作用。
v.截断,缩短( curtail的过去式和过去分词 )
  • Spending on books has been severely curtailed. 购书开支已被大大削减。
  • Their public health programme had to be severely curtailed. 他们的公共卫生计划不得不大大收缩。 来自《简明英汉词典》
adv.比较...地,相对地
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
学英语单词
Abraham,Plains of
acetyl ketene
alterna-teen
Amvrakikos Kolpos
anthydropic
areyne
auto-decrementing
Beruwala
blowdown time
bombesin
captees
cargo hand-over by both side
centesimally
cleaning of pipeline
comm mode
continuous murmur
couscouss
curlews
deep bed cooler
Denakil(Dankali)
ditch lining
draelos
dragonetti
Dulab
elastic shakedown
emergency instruction
erotylids
explanation
fabp
fight with the gloves off
fire warp
flipbook
foot-candle
Gestalt, gestalt
gone about
Gouy balance
historyless
Iban
inadmissibilities
inside gage
Iseran, Col de l'
Jālālpur
Karonie
l(a)evo-configuration
lattice scattered mobility
law of class struggle
liptocenosis
long fibred tobacco
long term manuring
loom width
maghemite
manufacturing domestic investment trends survey
maximum permissible displacement
mean activity coefficient of ions
means of expression
memory hierarchies
metamethods
methylphenyl ether
monstrum per fabricam alienam
mucosa
multifunction roasting machine for famous tea
NASS
nature of image
nonachlorobiphenyl
Nozhay-Yurtovskiy Ryaon
on inquiry
Onosma
ozonetoxicity
Peucedanum falcaria
plattensees
Polypodiophyta
protection form reprisal
protein fractionation
pseudo semantic tree
pseudo-balance
quasi-easement
reendothelialize
relay tank
removing dampness and dredging channel blockade
retainages
ruffled groove cast
saving graces
sealed pressure balance
secondary center
single canvas binder
soil extract
solver refrigeration cycle
soundboards
spike knot
super-sprinters
tenebrosins
thermonuclear explosion
tineid
tinplate bar
topping-ups
transistion rate
tribes-peoples
unavertable
unbelieveable
us government securities
vertical perpendicular break body
Wronskian