此资料由网络收集而来，如有侵权请告知上传者立即删除。资料共分享，我们负责传递知识。竟岗生产核算员演讲稿;rethinkingaboutwhattohavefordinner.yourbrainalsohasitsownsenseofwhatyoushouldweigh,nomatterwhatyouconsciouslybelieve.thisiscalledyoursetpoint,butthat'samisleadingterm,becauseit'sactuallyarangeofabout10or15pounds.youcanuselifestylechoicestomoveyourweightupanddownwithinthatrange,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.rudyleibelofcolumbiauniversityhasfoundthatpeoplewhohave此资料由网络收集而来，如有侵权请告知上传者立即删除。资料共分享，我们负责传递知识。lost10percentoftheirbodyweightburn250to400calorieslessbecausetheirmetabolismissuppressed.that'salotoffood.thismeansthatasuccessfuldietermusteatthismuchlessforeverthansomeoneofthesameweightwhohasalwaysbeenthin.fromanevolutionaryperspective,yourbody'sresistancetoweightlossmakessense.whenfoodwasscarce,ourancestors'survivaldependedonconservingenergy,andregainingtheweightwhenfoodwasavailablewouldhaveprotectedthemagainstthenextshortage.overthecourseofhumanhistory,starvationhasbeenamuchbiggerproblemthanovereating.thismayexplainaverysadfact:setpointscangoup,buttheyrarelygodown.now,ifyourmotherevermentionedthatlifeisnotfair,thisisthekindofthingshewastalkingabout.(laughter)successfuldietingdoesn'tloweryoursetpoint.evenafteryou'vekepttheweightoffforaslongassevenyears,yourbrainkeepstryingtomakeyougainitback.ifthatweightlosshadbeenduetoalongfamine,thatwouldbeasensibleresponse.inourmodernworldofdrive-thruburgers,it'snotworkingoutsowellformanyofus.thatdifferencebetweenourancestralpastandourabundantpresentisthereasonthatdr.yonifreedhoffoftheuniversityofottawawouldliketotakesomeofhispatientsbacktoatimewhenfoodwaslessavailable,andit'salsothereasonthatchangingthefoodenvironmentisreallygoingtobethemosteffectivesolutiontoobesity.sadly,atemporaryweightgaincanbecomepermanent.ifyoustayatahighweightfortoolong,probablyamatterofyearsformostofus,yourbrainmaydecidethatthat'sthenewnormal.psychologistsclassifyeatersintotwogroups,thosewhorelyon此资料由网络收集而来，如有侵权请告知上传者立即删除。资料共分享，我们负责传递知识。theirhungerandthosewhotrytocontroltheireatingthroughwillpower,likemostdieters.let'scallthemintuitiveeatersandcontrolledeaters.theinterestingthingisthatintuitiveeatersarelesslikelytobeoverweig...
