Of the many stories Courtney Martin told about eating disorders at the Dodd Center Wednesday, perhaps none was more striking than that of a freshman college student who was so determined to make the lacrosse team that she weighed 70 pounds by her second semester and had been hospitalized eight times.

Martin, the author of “Perfect Girls, Starving Daughters: The Frightening New Normalcy of Hating Your Body,” spoke to a mostly female audience about the pressures faced by contemporary girls and the outlet provided by eating disorders.