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1、FootStrikeandInjuryRatesinEnduranceRunners:ARetrospectiveStudy12324ADAMI.DAOUD,GARYJ.GEISSLER,FRANKWANG,JASONSARETSKY,YAHYAA.DAOUD,1andDANIELE.LIEBERMAN12DepartmentofHumanEvolutionaryBiology,HarvardUniversity,Cambridge,MA;DepartmentofAthletics,Harvard34University,Boston,MA;UniversityHealthSer
2、vices,HarvardUniversity,Cambridge,MA;andBaylorHealthCareSystem,InstituteofHealthCareResearchandImprovement,Dallas,TXABSTRACTDAOUD,A.I.,G.J.GEISSLER,F.WANG,J.SARETSKY,Y.A.DAOUD,andD.E.LIEBERMAN.FootStrikeandInjuryRatesinEnduranceRunners:ARetrospectiveStudy.Med.Sci.SportsExerc.,Vol.44,No.7,pp.1
3、325–1334,2012.Purpose:Thisretrospectivestudytestsifrunnerswhohabituallyforefootstrikehavedifferentratesofinjurythanrunnerswhohabituallyrearfootstrike.Methods:Wemeasuredthestrikecharacteristicsofmiddle-andlong-distancerunnersfromacollegiatecross-countryteamandquantifiedtheirhistoryofinjury,inc
4、ludingtheincidenceandrateofspecificinjuries,theseverityofeachinjury,andtherateofmild,moderate,andsevereinjuriespermilerun.Results:Ofthe52runnersstudied,36(69%)primarilyusedarearfootstrikeand16(31%)primarilyusedaforefootstrike.Approximately74%ofrunnersexperiencedamoderateorsevereinjuryeachyear
5、,butthosewhohabituallyrearfootstrikehadapproximatelytwicetherateofrepetitivestressinjuriesthanindividualswhohabituallyforefootstrike.Traumaticinjuryrateswerenotsignificantlydifferentbetweenthetwogroups.Ageneralizedlinearmodelshowedthatstriketype,sex,racedistance,andaveragemilesperweekeachcorr
6、elatesignificantly(PG0.01)withrepetitiveinjuryrates.Conclusions:Competitivecross-countryrunnersonacollegeteamincurhighinjuryrates,butrunnerswhohabituallyrearfootstrikehavesignificantlyhigherratesofrepetitivestressinjurythanthosewhomostlyforefootstrike.Thisstudydoesnottestthecausalbasesforthis
7、generaldifference.Onehypothesis,whichrequiresfurtherresearch,isthattheabsenceofamarkedimpactpeakinthegroundreactionforceduringaforefootstrikecomparedwitharearfootstrikemaycontributetolowerratesofinjuriesinhabitualforefootstrikers.KeyWords:RUN
