Weallknowthatexerciseisgoodforyourhealth.Butsomekindsofexercisemaybebetterthanothers.Runningforexamplemayhelptoprotectagainstheartdiseaseandotherhealthproblems.36Runningmaybegoodexercisebutitc

　　Weallknowthatexerciseisgoodforyourhealth.Butsomekindsofexercisemaybebetterthanothers.Runningforexamplemayhelptoprotectagainstheartdiseaseandotherhealthproblems. 　36Runningmaybegoodexercisebutitcanbedifficultonthebody.Herearefivecommonlysharedideasamongfitnessexpertstoreducetheriskofinjuryforpeoplenewtorunningorjogging.

　　1．Takeiteasy

　　　37Mostpeoplegetrunninginjurieswhentheypushthemselvestoohard.Thebodyneedstimetogetusedtoincreasesindistanceorspeed.Musclesandjointsneedtimetorecover.

　　2．Listentoyourbody

　　Mostrunninginjuriesdonotcomeoutoftheblue. 　38Theymayincludebodyaches，soremusclesandpainthatdoesnotgoaway.

　　3． 　39　

　　Thereisnosinglebestshoeforeveryrunner.Youshouldfindtheshoethatoffersthebestfitandsupportforyourfeet.Moreimportantly，youshouldreplaceyourshoesevery500to800kilometers.

　　4．Takegoodnotes

　　Takesometimeaftereachruntowritedownnotesaboutwhatyoudidandhowyoufelt.Lookforpatterns，thingsthathappenoverandoveragain.Forexample，youmayfindthatyourkneesachewhenyourunonconsecutiveorback-to-backdays.Butperhapsyoufeelgreatwhenyourestinbetweenrunningdays. 　40　

　　5．Crosstrain

　　Aswesaidearlier，runningishardonyourbody.Sophysicalfitnessexpertssuggestsomeformofcrosstrainingtoimprovemusclebalanceandtohelpyoustayinjuryfree.Theysayswimmingcyclingandyogaaregoodexercisestocombinewithrunning.Theseexercisesareeasieronthebody.

　　A. Haveagoodrestafterrunning.

　　B．Getgoodrunningshoes.

　　C．Usually，therearewarningsigns.

　　D．Runningisbetterthanswimming.

　　E. Donotruntoomuch，toosoonortoofast.

　　F．Runningalsomayhelpyou1ivelonger.

　　G．Thesenoteswillhelpyouidentifythebestworkoutforyou.