If you want to stay healthy，why not take a quick walk every day？You may think that taking a walk can't make a big （1）

difference

difference

（different） and that you need to do something like running to stay healthy.
    Well， （2）

a

a

new study says it is not true.It finds out that walking may be as good for us as running.Walking is one of the easiest and safest （3）

sports

sports

（sport） a person can do. （4）

For

For

example，if you are out of shape after an illness（疾病），you should try walking instead of running.You can do a little at a time.
    Walking is free.You can walk without （5）

using

using

（use） any special equipment（设备）.You can do it anywhere，and you can （6）

easily

easily

（easy） start a short walk.You can walk with （7）

your

your

（you） friends，co-workers，family members or pets.Or you can walk alone.All you have to do is to start moving.
    Walking is a great way（8）

to relax

to relax

（relax） after a long hard day of work.Walking is healthy and easy， （9）

but

but

it is not a great sport for everyone，especially for those people with bad knees（膝盖）.
    In some ways，the farther you walk，the （10）

healthier

healthier

（healthy） you'll become.