Sorting through the mental, physical, and emotional aspects of a girl's life during her teen years, this guide presents positive reasons and practical advice for making fitness a permanent part of her life. As society becomes more accepting of truly athletic women, teen girls are encouraged to overcome a ''quitter's mentality'' and develop physical confidence and mental toughness. A variety of nutrition tips and fitness facts allow girls to design individual workouts. Also included is information geared toward teens on weight lifting, cardiovascular conditioning, joining a gym, and working out at home.