节食演讲稿范文

参考资料，少熬夜！节食演讲稿范文【前言导读】刀客网友为您整理编辑的“节食演讲稿范文”精选优质范文，供您参考学习，希望对您有所帮助，喜欢就下载支持呢！ted英语演讲稿：为什么节食减肥没效果？1简介：在美国，80%的女孩在她们10岁的时候便开始节食。神经学家sandraaamodt结合自己的亲身经历，讲述大脑是如何控制我们的身体的。节食减肥为何没效果?来听听她的说法吧!threeandahalfyearsago,imadeoneofthebestdecisionsofmylife.asmynewyear'sresolution,igaveupdieting,stoppedworryingaboutmyweight,andlearnedtoeatmindfully.nowieatwheneveri'mhungry,andi'velost10pounds.thiswasmeatage13,whenistartedmyfirstdiet.ilookatthatpicturenow,andithink,youdidnotneedadiet,youneededafashionconsult.(laughter)butithoughtineededtoloseweight,andwhenigaineditback,ofcourseiblamedmyself.andforthenextthreedecades,iwasonandoffvariousdiets.nomatterwhatitried,theweighti'dlostalwayscameback.i'msuremanyofyouknowthefeeling.asaneuroscientist,iwondered,whyisthissohard?obviously,howmuchyouweighdependsonhowmuchyoueatandhowmuchenergyyouburn.whatmostpeopledon'trealizeisthathungerandenergyusearecontrolledbythebrain,mostlywithoutyourawareness.yourbraindoesalotofitsworkbehindthescenes,andthatisagoodthing,becauseyourconsciousmind--howdoweputthispolitely?--it'seasilydistracted.it'sgoodthatyoudon'thavetoremembertobreathewhenyougetcaughtupinamovie.youdon'tforgethowtowalkbecauseyou'rethinkingaboutwhattohavefordinner.yourbrainalsohasitsownsenseofwhatyoushouldweigh,nomatterwhatyouconsciouslybelieve.thisiscalledyoursetpoint,butthat'samisleadingterm,becauseit'sactuallyarangeofabout10or15pounds.youcanuselifestylechoicestomoveyourweightupanddownwithinthat参考资料，少熬夜！range,butit'smuch,muchhardertostayoutsideofit.thehypothalamus,thepartofthebrainthatregulatesbodyweight,therearemorethanadozenchemicalsignalsinthebrainthattellyourbodytogainweight,morethananotherdozenthattellyourbodytoloseit,andthesystemworkslikeathermostat,respondingtosignalsfromthebodybyadjustinghunger,activityandmetabolism,tokeepyourweightstableasconditionschange.that'swhatathermostatdoes,right?itkeepsthetemperatureinyourhousethesameastheweatherchangesoutside.nowyoucantrytochangethetemperatureinyourhousebyopeningawindowinthewinter,butthat'snotgoingtochangethesettingonthethermostat,whichwillrespondbykickingonthefurnacetowarmtheplacebackup.yourbrainworksexactlythesameway,respondingtoweightlossbyusingpowerfultoolstopushyourbodybacktowhatitconsidersnormal.ifyoulosealotofweight,yourbrainreactsasifyouwerestarving,andwhetheryoustartedoutfatorthin,yourbrain'sresponseisexactlythesame.wewouldlovetothinkthatyourbraincouldtellwhetheryouneedtoloseweightornot,butitcan't.ifyoudolosealotofweight,youbecomehungry,andyourmusclesburnlessenergy.dr.rudyleibelofcolumbiauniversityhasfoundthatpeoplewhohavelost10percentoftheirbodyweightburn250to400calorieslessbecausetheirmetabolismissuppressed.that'salotoffood.thismeansthatasuccessfuldietermusteatthismuchlessforeverthansomeoneofthesameweightwhohasalwaysbeenthin.fromanevolutionaryperspective,yourbody'sresistancetoweightlossmakessense.whenfoodwasscarce,ourancestors'survivaldependedonconservingenergy,andregainingtheweightwhenfoodwasavailablewouldhaveprotectedthemagainstthenextshortage.overthecourseofhumanhistory,starvationhasbeenamuchbiggerproblemthanovereating.thismayexplainaverysadfact:setpointscangoup,buttheyrarelygodown.now,ifyourmotherevermentionedthatlifeisnotfair,thisisthekindofthingshewastalkingabout.参考资料，少熬夜！(laughter)successfuldietingdoesn'tloweryoursetpoint.evenafteryou'vekepttheweightoffforaslongassevenyears,yourbrainkeepstryingtomakeyougainitback.ifthatweightlosshadbeenduetoalongfamine,thatwouldbeasensibleresponse.inourmodernworldofdrive-thruburgers,it'snotworkingoutsowellformanyofus.thatdifferencebetweenourancestralpastandourabundantpresentisthereasonthatdr.yonifreedhoffoftheuniversityofottawawouldliketotakesomeofhispatientsbacktoatimewhenfoodwaslessavailable,andit'salsothereasonthatchangingthefoodenvironmentisreallygoingtobethemosteffectivesolutiontoobesity.sadly,atemporaryweightgaincanbecomepermanent.ifyoustayatahighweightfortoolong,probablyamatterofyearsformostofus,yourbrainmaydecidethatthat'sthenewnormal.psychologistsclassifyeatersintotwogroups,thosewhorelyontheirhungerandthosewhotrytocontroltheireatingthroughwillpower,likemostdieters.let'scallthemintuitiveeatersandcontrolledeaters.theinterestingthingisthatintuitiveeatersarelesslikelytobeoverweight,andtheyspendlesstimethinkingaboutfood.controlledeatersaremorevulnerabletoovereatinginresponsetoadvertising,super-sizing,andtheall-you-can-eatbuffet.andasmallindulgence,likeeatingonescoopoficecream,ismorelikelytoleadtoafoodbingeincontrolledeaters.childrenareespeciallyvulnerabletothiscycleofdietingandthenbinging.severallong-termstudieshaveshownthatgirlswhodietintheirearlyteenageyearsarethreetimesmorelikelytobecomeoverweightfiveyearslater,eveniftheystartedatanormalweight,andallofthesestudiesfoundthatthesamefactorsthatpredictedweightgainalsopredictedthedevelopmentofeatingdisorders.theotherfactor,bytheway,thoseofyouwhoareparents,wasbeingteasedbyfamilymembersabouttheirweight.sodon'tdothat.(laughter)ileftalmostallmygraphsathome,buti参考资料，少熬夜！couldn'tresistthrowinginjustthisone,becausei'mageek,andthat'showiroll.