Depends purely on how much you move throughout the day, but when you’re completely starved of calories you’re not going to be burning any extra calories through movement whatsoever lol. Your body cannot run on 800 calories, it’s trying to tell you that and you’re doing everything in your power to ignore it, yes losing weight for your health is important, doing so in a way that is so against the way our bodies want to function makes no sense
800 calories isn’t even enough to feed a little girl, if you want to lift, live, work like a little girl go right ahead, but even just going to 1400 or 1600 calories a day would help an incredible amount with day to day enjoyment of life while still maintaining a huge deficit