EFFECT OF STRENGTH TRAINING ON AGING MUSCLES OF ELDERLY PEOPLE

Abstract

See, stats, and : https : / / www . researchgate . net / publication / 305185281 EFFECT AGING Article . Japanese 2003 DOI : 10 . 7600 / jspfsm1949 . 52 . 17CITATIONS2READS3235,including:Some:The(J-HAP)ViewJapaneseShinyaUniversity211,556SEEHarukaNational143,138SEEAll.The.All-textand,letting.AbstractTheabilitytowalkisjustasimportantfortheelderlyasitisforyoungpeople.Infact,intheelderly,decreasedmobilitylimitsfunctionindailylifeandcanleadtomoreserioussituations(e.g.,becomingbedridden).Theelderlypopulationhasincreasedoverthelastdecade,andmanyresearchershavestudiedthemobilityoftheelderly.However,thefocusofmoststudieshasbeentofacilitaterecoveryofbedriddenindividualsandpreventtheelderlyfrombecomingbedridden,andparticularlytopreventfall-inducedfractures,whichoftencausetheelderlytobecomebedridden.However,about70-80%oftheelderlypopulationdonotrequirecare,anditisnecessarytoconductresearchonthemaintenanceofactivitiesofdailylivingtomakeitpossiblefortheelderlytoworkorvolunteer.Fromthisperspective,mobilityisanimportantphysicalfactor.Mobilityisdependentonmuscleactivityandithaslongbeenknownthatagingreducesmusclemass.Therefore,itisfeasi-bletoassumethatreducedmusclemassleadstodecreasedabilitytowalk,andwehaveproventhatthereisaclosecorrelationbetweenthetwo.Whenpresentingtheideaofstrengthtrainingtotheelderly,itisappropriatetofocusonthemaintenanceandimprovementofmobility,notonthetrain-ingitself.Theresultsofourresearchcanbesummarizedasfollows:Musclemassdecreaseswithage,withthelegsbeingaffectedtoagreaterdegreethanthearms.Moreover,muscleatrophyisdependentonweakeningofmusclefibers,especiallyfast-twitch(TypeII)fibers.Reducedlowerlimbmusclemassincreasestheriskoffallingandcandecreasewalkingabilitytoadegreethatcanaffectdailylivingactivities.Inordertoimprovereducedmusclemassinaging,itisimportanttouseanexerciseprogramthatisdesignedtostrengthenfast-twitchfibers,whichcanbefollowedevenbytheelderly.Sincewalk-ingtherapymostlymobilizesslowtwitchfibers,itisnoteffectiveinpreventingandimprovingmus-cleatrophy.Itisimportanttohaveanexerciseprogramthatisdesignedtomobilizefast-twitchfibers.