Maitred’andExtraordinaryPlacestoEathostFredSirieixandGPZoeWilliamsopenarestaurantwithadifference,welcoming20unsuspectingdinersforaslap-upmeal.Itallsoundsnormalenough,butthisrestauranthassomethingunexpectedbackofhouse-afunctioninggym,whereagroupoffitnessfanaticsarepoisedonexercisebikes,treadmillsandrowingmachines,readytoburnoffeverysinglecalorieorderedandconsumedbythediners.ThisgroundbreakingstuntforsciencestrandHorizonisbasedonthelatestscientificresearch,whichsuggeststhatwhenweareshowntheastonishingamountofexerciserequiredtoremoveexcesscaloriesfromourbodies,wechoosetoeatupto20%less.The495-caloriecalamaristarterdemandsapunishinghourand12minutesontherowingmachine.Thefishandchipstakestwohoursandfourminutesontheexercisebiketoburnoff,andrunningforanhourandnineminutesistheexerciseequivalentofthechocolatebrownie.FredandZoealsodelveintothescienceofcalories,includingwhyweneedthemandwhywearecollectivelyeatingmorethanweareburning,asituationwhichhasleftnearlytwothirdsofthepopulationoverweightorobese.Theyexaminenewscience,learningthatourgenesinfluenceourweight,notbychanginghowwemetabolisefood,butbydetermininghowhungrywefeel.Theyalsodelveintoourmicrobiometodiscoverhowahealthygutcouldhelpusburnfat.Puddingspolishedoff,thedinersareletinonthesecretgym.Willtheknowledgechangetheirbehaviour,astheresearchsuggests,orleaveanastytasteinthemouth?