This reporting was supported by the Rosalynn Carter Fellowship for Mental Health Journalism . WHEN PUBERTY HIT KATERINA RINALDI in middle school, it hit hard, fast, and earlier than everyone else. Quickly, Rinaldi started gaining weight; her body started changing, too. As she puts it, “I had curves.” With those curves came attention, especially from guys. Rinaldi didn’t dig it. So she started dieting in the way a type-A tween might: a skipped meal here, a salad there, a bonus run in between. “I