I am a 17 year old girl weighing about 140ish and I am wanting to get down to about 130 pounds. I have been trying this diet on this app of eating a 1500 calorie diet. I eat healthy but should drink a lot more water. I don't exercise that much, but I used to be extremely active (exercising 4 times a week, sometimes 3 practices a day, weight lifting, basketball team, track, cross country). My question is: if I eat a 1500 healthy calorie diet with minimal exercise, will I lose weight? and will the weight stay off?