Outline.

 (I)  Nowadays, more and more people are interesting in running wherever, organizing groups of people to go running together.

(II) The advantages of doing sports.

     A.      It is a very good way for keep healthy our self.

   B.     That makes us feel stronger and self-confident. 

(III) The disadvantages of doing sports.

A.       People should hurt their selves’ cause of doing a bad movement

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B.        Enough exercise may be dangerous.

Conclusion: In spite of the disadvantages, sports are and will always be the best option to forget problems, make us stronger and socialize with other people.