简介：ThisissueofJournalofSportandHealthSciencecontainsapoint-counterpointdiscussionofhamstringinjuriesinsprintrunningbythegroupsofDrs.LiuandYu.~(1–4)Theyproposedifferentmechanismsofmuscleinjuriesingeneral,andhamstringinjuriesinsprintrunningspecifically.Yuetal.2,4presentevidencesuggestingthathamstringinjuriesareprimarilycausedbyexcessivemusclestrainduringeccentriccontraction.Inmaximaleffortsprintrunning,excessivemusclestrains

简介：<正>Background:Centralsensitizationhasbeenassociatedwithchronicpaininwhiplashpatients.Methods:Consecutivewhiplashpatientswereassessedat3monthspost-whiplashinjurywiththebrachialplexusprovocationtest(BPPT)asasignofcentralsensitization.Self-reportedrecoverywasassessedbytheresponsetothequestion’Doyoufeelyouhaverecoveredfullyfromyouraccidentinjuries?’Results:Sixty-ninesubjects(32males,37females,age37.5±13.0years(mean±SD),range18—71)wereincluded.Ofthese,34reportedalackofrecovery,and35reportedrecoveryat3monthspost-injury.ThemeanBPPTelbowextension(from180°)was41.5±23.0°,andthemeanVASscorefortheBPPTwas2.2±1.2(outof10).ThosewhoreportedrecoveryhadameanBPPTelbowextensionangleof25.1±15.8whilethosewhodidnotreportrecoveryhadameanBPPTangleof58.4±15.9(P<0.05).Thevisualanaloguescale(VAS)scoreforrecoveredsubjectswas1.8±1.1and2.7±1.1(P<0.05)fornon-recovered.Therewasamoderatecorrelationbetweenself-reportedrecoveryandBPPTelbowextensionangle(—0.44)andalowercorrelationbetweenself-reportedrecoveryandVASscore(-0.30).Conclusion:Self-reportedrecoverycorrelateswellwithalowerlikelihoodofsignsofcentralsensitization.

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简介：Background:Motorcompetenceandhealth-relatedfitnessareimportantcomponentsforthedevelopmentandmaintenanceofahealthylifestyleinchildren.Thisstudyexaminedcross-culturalperformancesonmotorcompetenceandhealth-relatedfitnessbetweenPortugueseandU.S.children.Methods:Portuguese(n=508;10.14±2.13years,mean±SD)andU.S.(n=710;9.48±1.62years)childrenperformedtestsofcardiorespiratoryfitness(ProgressiveAerobicCardiovascularEnduranceRun),upperbodystrength(handgrip),locomotorskillperformance(standinglongjump),andobjectprojectionskillperformance(throwingandkicking).PortugueseandU.S.childrenweredividedinto2agegroups(6à9and10à13years)fordataanalysispurposes.Atwoàfactoroneàwayanalysisofcovariance(ANOVA)wasconductedwiththeProgressiveAerobicCardiovascularEnduranceRun,handgrip,standinglongjumpscores,kicking,andthrowingspeed(km/h)asdependentvariables.Results:ResultsindicatedthatPortuguesechildren,irrespectiveofsex,presentedbetterperformancesinlocomotorandcardiorespiratoryperformance(standinglongjumpandProgressiveAerobicCardiovascularEnduranceRun)thanU.S.childreninbothagebands.U.S.childrenoutperformedPortuguesechildrenduringthrowingandhandgriptests.Kickingtestspresentedgenderdifferences:PortugueseboysandU.S.girlsoutperformedtheirinternationallymatchedcounterparts.Conclusion:Culturaldifferencesinphysicaleducationcurriculaandsportsparticipationmayimpactdifferencesinmotorcompetenceandfitnessdevelopmentinthesecountries.

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简介：TherecentpublicationbyChekroudetal.inLancetPsychiatryfocusesontherelationshipbetweenphysicalexerciseandmentalhealth.Mentalhealthisdefinedasoptimalpersonalfunctioning"resultinginproductiveactivities,fulfillingrelationshipswithotherpeople,andtheabilitytoadapttochangeandtocopewithadversity".(p.4)Recently,mentalhealthhasnolongerbeendescribedasadichotomousstatebutasacontinuum,withpersonalmentalstatesrangingfromhighlyfunctionaltomentallyill.