I use my strips in the mornings, so usually if I'm going back into ketosis I notice very restless sleep the night before. Not that I don't sleep, I just move around a lot because I wake up with the blankets all twisted. Maybe this is just me, but that's how it goes everytime I'm out of ketosis and go back in. Also, before I even test to see if the strips show I'm in ketosis, I wake up thinking much more positively about my body.