weallknowthatwe \’ dbehealthierandhppierifweexerciseregularly.but，in reality，it rarely (少见) happens.theusgovenmentsugget
anewstudysuggetsthatyoudon \’ thavetoexercisethatmuchtostayhealthy.evenlittlebitsofexersiceareenoughtoimprovehealth.thealth ies about the link )链接)风险) of heart disease )； nine of the studies examined (检查) the amount数量ofexercisepeoplegot.theresearchersfoundthatpeoplewhogot 150 minutesofexerciseawee
Of coures，morewasbetter.peoplewhodid 300 minutesofexerciseaweekhada 20 % dropintheriskofheartdisease， comparedwith(… (与…相比) thosewhodidn \’ texerciseatall.beyond that，however， the benefits tended (大多数情况下) to become less obvious (明显的).thosewhogot 750 minutesaweekhada 25 % lowerriskofheartdiseasethanthosewanthosethosewanthose
theresearchersalsofoundthatevenlittlebitsofexercisejust 75 minutes a week，whichisaboutaneasy 15 minuteswalkeachweekdays-offeredged
The resullts should encourage (鼓励) ) ustodoatleastalittlebitmoreexerciseadayevenifwearebusy.andtheycouldhelpencouragetheinsy peopletogetstarted.\’ ifyouaredoingnothing，do something \’，Barry Franklin，aspokesmanfortheamericanheartassociation，said for example，walking 10 or 15 minutes，two to three times a week do more.\’
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