阅读理解专题训练P eop le a re bu s y w o rki ng e very d ay
T h ey d o not have enou gh time to do e x er c is e
So m a n y people b ec o m e t o o f at or too t hin
W e n e ed to do e xercise to keep fi t
Ther e a r e many k ind s o f exe r cis e
B e nding and stret c hing h elp s us m ove easi l y
Before we play ba l l gam e s o r swim, we s ha l l do bendin g and s t retc hi ng exe r c i se firs t
This kind of exercise is so m etimes calle d w a r m-up exe r cis e
Run n i n g i s a l s o g o od exerc i se
I f we can n ot run f ast, w e can jog
J o ggin g mea n s runnin g slowly
Aga i n, before we run or jo g, w e mu s t d o s o me war m—up e xe rcise
Also, we sh o uld not r u n or jog in bu sy street s
It is not safe and the air th e re is often di r ty
makes man y pe o ple t