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1、TEDSandraAamodt为什么节食不能减肥Threeandhalfayearago,Imadeoneofthebestdecisionsofmylife.AsmyNewYear’sresolution,Igaveupdieting,stoppedworryingaboutmyweight,andlearnedtoeatmindfully.NowIeatwheneverI’mhungry,andI’velost10pounds.Thiswasmeatage13,whenIstartedmyfirstdiet.Ilookatthatpicturenow,a
2、ndIthink,youdidnotneedadiet,youneededafashionconsult.ButIthoughtIneededtoloseweight,andwhenIgaineditback,ofcauseIblamedmyself.I’msuremanyofyouknowthefeeling.Asaneuroscientist,Iwondered,whyisthissohard?Obviously,howmuchyouweighdependsonhowmuchyoueatandhowmuchenergyyouburn.Whatmostpe
3、opledon’trealizeisthathungerandenergyusearecontrolledbythebrain,mostlywithoutyourawareness.Yourbraindoesalotofitsworkbehindthescenes,andthatisagoodthing,becauseyourconsciousmind--howdoweputthispolitely?--it’seasilydistracted.It’sgoodthatyoudon’thaveremembertobreathewhenyougetcaught
4、upinamoive,youdon’tforgethowtowalkbecauseyou’rethinkingaboutwhattohavefordinner.Yourbrainalsohasitsownsenseofwhatyoushouldweigh,nomatterwhatyouconsciouslybelieve.Thisiscalledyoursetpoint,butthat’samisleadingterm,becauseit’sactuallyarangeofabout10or15pounds.Youcanuselifestylechoices
5、tomoveyourweightupanddownwithinthatrange,butit’smuch,muchhardertostayoutsideofit.Thehypothalamus,thepartofthebrainthatregulatesbodyweight,therearemorethanadozenchemicalsignalsinthebrainthattellyourbodytogainweight,morethananotherdozenthattellyourbodytoloseit,andthesystemworkslikeat
6、hermostst,respondingtosignalsfromthebodybyadjustinghunger,activityandmetabolism,tokeepyourweightstableasconditionschange.That’swhatathermostatdoes,right?Itkeepsthetemperatureinyourhousethesame,astheweatherchangesoutside.Nowyoucantrytochangethetemperatureinyourhousebyopeningawindowi
7、nthewinter,butthat’snotgoingtochangethesettingonthethermostat,whichwillrespondbykickingonthefurnacetowarmtheplacebackup.Yourbrainworksexactlythesameway,reapondingtoweightlossbyusingpowerfultoolstopushyourbodybacktowhatitconsidersnormal.Ifyoulosealotofweight,yourbrainreactsasifyouwe
8、restarving,andwhetheryoust
