I have been successfully following 5:2 and record my food intake online. I keep to the 500 cals per day for women on fast days and to my TDEE on feast days and so far lost 20 lbs quickly and have kept if off. I still enjoy doing one fast day each week. When I know I’m going out for a special occasion I eat less the day or so before and that is how I maintain. Just started BSD so I am also trying to keep below 50g carbs per day.
Do you have to stick to 800 calories per day? Has anyone tried working to 5,600 calories per week?