Seeing as the BMI calculations can not always be accurate, it is generally acknowledged, if you combine a 1’200 calorie a day intake with four or five exercise sessions a week, then a 1’200 calories-a-day eating plan will help you reach your weight-loss goals, over time. The exact amount of weight loss will be different for everyone and will depend on how much weight you have to lose and how much energy is expended during each exercise session.