Forthousandsofyears,physicalactivityhasbeenassociatedwithhealth.Today,sciencehasconfirmedthelink,withoverwhelmingevidencethatpeoplewholeadactivelifestylesarelesslikelytodieearly,ortoexperiencemajorillnessessuchasheartdisease,diabetesandcoloncancer. 　　Exercisebenefitseverypartofthebody,includingthemind.Exercisingcausesthebodytoproduceendorphins,chemicalsthatleadapersontofeelpeacefulandhappy.Exercisecanhelpsomepeoplesleepbetter.Itcanalsohelpwithmentalhealthissuessuchasmilddepressionandself-esteem.Plus,exercisecangivepeoplearealsenseofaccomplishmentandprideathavingachievedacertaingoal-likebeatinganoldtimeinthe100-meterdash. 　　Exercisingcanhelpyoulookbetter,too.Peoplewhoexerciseburncaloriesandlookmoretonedthanthosewhodon't.Infact,exerciseisoneofthemostimportantpartsofkeepingyourbodyatahealthyweight.Whenyouexercise,youburnfoodcaloriesasfuel.Ifapersoneatsmorecaloriesthanheorsheburns,thebodystoresthemawayasfat.Exercisecanhelpburnthesestoredcalories. 　　Finally,exercisingtomaintainahealthyweightalsodecreasesaperson'sriskofdevelopingcertaindiseases,includingtype2diabetesandhighbloodpressure.