a halthy dit and rgular xrcis may hlp to prvnt obsity among childrn.tak li ming for xampl.li ming usd to b a hahhv boy, but ovr a yar ago, h got into th habit of ating a lot of junk food and snacks. bsids, h spnt a lot of tim lying on th sofa, watching tv, and did littl xrcis. as a rsult, h put on so much wight that h found it difficult to chimb stairs.so li ming dcidd to chang th unhalthy lif styl, ftc bgan to hav balancd, halthy dit. itc also took part in various sports activitis such as swimming, skating, running and playing baskllball. months latr, li ming bcam as fit as bfor.