The National Education Policy Center, citing a paper in the British Journal of Health Psychology ("Body Dissatisfaction, dieting awareness, and the impact of parental influence on young children" by Lowes, Jacinta and Tiggerman, 2003), reports that "girls as young as five years old report wanting a thinner body." (http://nepc.colorado.edu/publication/Schoolhouse-commercialism-2010)

It would be interesting to investigate whether involvement in dance influences girls' body images and the resulting effect on their health.