Sports play a big part in our daily lives. One popular sport is running. The marathon is a kind of long-distance race. And it    1    an Olympic sport in 1896. The length of a full marathon is 42.195 kilometers.

It is not easy to complete the race, but the marathon is still popular in a lot of countries. The main reason is that it is good for people. If people keep running long distances, they    2    a strong will. What’s more, people are busy with their study or work these days. They usually feel tired    3    . Running can help them relax their    4    and minds.

I’m always a sports fan and I like running best. I ran a marathon several years ago because I not only wanted to improve my running skills, but also enjoyed the    5    of running and making friends.

When you feel bored, tired or unhappy, join in it and run into the future!