Research Papers / effects of weight consciousness to the high school students-problem statement [4]

i really need help to make or elaborate my statement of the problem..
this is the topic: effects of weight consciousness to the highschool students.

specifically, this study aims to answer the following questions:
1. How does being overweight affect ones self esteem?
2. why do slim people still diet?

how can i elaborate my statement problems.. please i need answers