I know some may disagree, but I actually think it’s OK to do some light exercise such as going for a walk outside during a dry fast. No more than 3 miles, keep it chill, but yeah. Your body will “eat” during the walk, as in eat its own body fat, you won’t feel as hungry after. And the walk will have generated some metabolic water also from the fat burned, so you’ll feel less thirsty. Plus, you get some sunlight.