已领AnEverydayActivityThatBoosts

　　标题：AnEverydayActivityThatBoostsBrainSizeAndFlexibleT
　　source：spring
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　　Adultswhoaremorephysicallyactivehavegreatermentalflexibility，newresearchreports。
　　Ontopofthis，thosewhodomoreexercisehavelargerbrainvolumesandmoreintactwhitematter。
　　Thenewresearchfoundthatmoderateorvigorousphysicalactivitywaslinkedtomorevariablebrainactivityinolderadults。
　　It’sknownthatvariablebrainactivityislinkedtoperformingbetteroncomplexcognitivetasks。
　　ProfessorAgnieszkaBurzynska，wholedtheresearchsaid：
　　“Welookedat100adultsbetweentheagesof60and80，andweusedaccelerometerstoobjectivelymeasuretheirphysicalactivityoveraweek。
　　Wefoundthatspontaneousbrainactivityshowedmoremomenttomomentfluctuationsinthemoreactiveadults。
　　Inapreviousstudy，weshowedthatinsomeofthesameregionsofthebrain，thosepeoplewhohavehigherbrainvariabilityalsoperformedbetteroncomplexcognitivetasks，especiallyonintelligencetasksandmemory。”
　　Participantshadtheirbrainsscannedandtheamountofexercisethey’ddoneoveraweekrecorded。
　　Themicroscopicintegrityofthebrain’swhitematterfibreswasalsoexamined。
　　Thewhitematteristhebrain’scabling：ittransmitssignalsbetweendifferentareas。
　　ProfessorArtKramer，alsoastudyauthor，said：
　　“Ourstudy，whenviewedinthecontextofpreviousstudiesthathaveexaminedbehavioralvariabilityincognitivetasks，suggeststhatmorefitolderadultsaremoreflexible，bothcognitivelyandintermsofbrainfunction，thantheirlessfitpeers。”
　　Notonlydoesthestudyunderlinethementalbenefitsofexercise，italsoprovidesanotherwaytoassessbrainhealthinaging。
　　ProfessorBurzynskasaid：
　　“Wewanttoknowhowthebrainrelatestothebody，andhowphysicalhealthinfluencesmentalandbrainhealthinaging。
　　Here，insteadofastructuralmeasure，wearetakingafunctionalmeasureofbrainhealth。
　　Andwearefindingthattrackingchangesinbloodoxygenationlevelsovertimeisusefulforpredictingcognitivefunctioningandphysicalhealthinaging。”
　　Onedayitmaybepossibletotellhowphysicallyfitapersonisbyimagingthebrain。
　　ThestudywaspublishedinthejournalPLOSONE（Burzynskaetal。，2015）。