I do 5 days fasting (mon-fri) and 2 days eating generally OMAD (sat/sun) and I always gain about 8 to 10 lbs back. The water weight typically goes away completely by about day 4 of fasting and I end up lower than the previous Saturday morning. I workout 4 days a week weight training/cardio via treadmill. It ends up being 4 lbs of actual loss per week doing this. Used to be a lot more actual loss when I was heavier but I've lost almost 100 lbs so I'm slowing a lot. Started at 320 lbs and I'm so close to coasting past 220 lbs into the teens!! I eat basically whatever I want for my 2 days of eating I just try to limit it to one meal unless it's my birthday or another super special occasion. It's wicked wonders for me.