Hi good advice from Jilly, most of us actually do 3 DD 4 UP days DD sbeing MWF and UPs being t,th sat+Sun you can of course do alternate and some here do. To be honest the success of this diet is attributed in part to its longevity, as jilly says if you have a lot to lose you are better off doing 3 DD , you are less likely to get diet fatigue and this means you won't fall off the wagon. I am on week 19 have had every weekend off since I started and have no intention of ever leaving it, I have no need to want to get off this diet as I have normal weekends with my family and never miss any foods as they are not far away, But juddd is a very individual diet and you may want to do strict alternates and that is entirely up to you, do whatever you feel more comfortable with x