Write an autobiography of your involvement in sport or the lack thereof.  Integrate relevant lecture materials, videos and readings with recollections of personal experiences in so doing.  This is an exercise in applied sociology. Use what you are learning in the course to try to analyse your own experiences.  The exercise is about explaining, not merely describing.  You may write in the first person but you must refer to specific authors, research and/or theories (e.g., according to Smiths theory of violence.) when writing it.  Do include an appropriate and meaningful bibliography.
If you consider:
    yourself too uninteresting a s a subject, or
    the subject is too sensitive
you may write about another person, real or fictional, living or dead.