下面这篇两个题目都适用.

　　Allofusknowthatexerciseisgoodforourhealth.Regularexercisecanhelpprotectyoufro-

　　mheartdiseaseandstroke,highbloodpressure,obesity,backpain,osteoporosisandcanimprove

　　yourmoodandhelpyoutobettermanagestress.Exercisemaypowerupthebrainbesidesstveng-

　　theningtheheartandlungs,bonesandmuscles.Asuccessionofscientificstudiesofanimalsimp-

　　liesthatphysicalactivityhasapositiveeffectonmentalfunctioning.

　　Ofcourse,everythinghasitscontradictory.However,fewareawareofthefactthatoneof

　　theresultofdoingexerciseisironloss.Exercisecanresultinironlossforthefollowingreasons.

　　Oneisthatsomeironislostinsweatproducedintheexercise.Anotherreasonisbloodleaking.

　　Besides,exercisemayreflectonbruise.

　　Inaword,exercisemaydousgoodbutalsoharm.So,moderateexerciseisnecessary,but

　　youshouldpayattentiontosomeproblemswhenyoudousomeexercise.

　　Certainly,inmyopinion,doingmoreexercisemayhaveunexpectedbenefits,aslongasyouhavehealth-conscious.