【找出中心句.Peoplearebusyworkingeveryday,sotheydonothaveenoughtimetodoexercises.Asaresult(结果),manypeoplebecometoofatortoothin.Tokeepourbodieshealthy,wehavetodoexerciseeveryday.Therearemanykindsofexercise.】

　　找出中心句.

　　Peoplearebusyworkingeveryday,sotheydonothaveenoughtimetodoexercises.Asaresult

　　(结果),manypeoplebecometoofatortoothin.Tokeepourbodieshealthy,wehavetodoexercise

　　everyday.

　　Therearemanykindsofexercise.Bending(弯腰)andstretching(伸展)helpsusmoveeasily.Before

　　weplayballgamesorswim,itisbetterforustodobendingandstretchingexercisefirst.Thiskindof

　　exerciseissometimescalledwarm-upexercise.Runningisalsoagoodexercise.Ifwecannotrunfast,

　　wecanjog.Joggingmeansrunningslowly.Again,beforewerunorjog,wemustdowarm-upexercise.

　　Also,weshouldnotrunorjoginbusystreets.Theairthereisoftendirty.Somepeoplelikeweightlifting

　　(举重)becauseitcanmaketheirbodiesstrong.Also,weneedtodosomewarm-upexercisesbefore

　　weightlifting.