英语翻译1Ifexercise wears you out,how can it be good for you?Bec

英语翻译
1Ifexercise wears you out,how can it be good for you?
Because ourbodies adapt to everything we do to them.And as far as your body is concerned,it’s “use it,or lose it”!It’s not that exercise makes you healthy,it’s more that a lack of exercise leavesyour body weak and easily affected by disease.
2
Do old people shrink as they age?
Yes and no.Manypeople do get shorter as they age.But,when they do,it isn’t because they’reshrinking all over.They lose height as their spine（脊柱） becomes shorter and more curved due to disuse and theeffect of gravity(重力).Many (but not all) menand women do lose height as they get older.Men lose and average of 3-4 cm inheight as they age,while women may lose 5 cm or more.If you live to be 200years old,would you keep shrinking till you were,like 60 cm tall,like alittle boy again?No,because old people don’t really shrink!It is not that they are growingbackwards ----- their legs,arms and backbones getting shorter.When they doget shorter,it’s because the spine hasshortened a little.Or,more often,become more bent and curved.