all girls, you were probably losing fat and building muscle and thats why you didn't lose weight. Scales are horrible things! I've always found the best way to tell if i'm losing weight is to measure myself and see how my clothes fit. I no longer lose weight and I do 5 days a week, 2 hours a day at the gym. At some point you plateu (sp?). Infact, when I have a week off due to the kids being ill or something I usually lose a couple of kilos but thats all muscle.