After the past month of walking to work in the summer heat with no change in my weight, my body has suddenly decided to start tapping into the old fat reserves with a vengeance. I've lost five pounds since Monday. I wish my metabolism could give me some clue as to what I'm suddenly doing right. Is it the yummy vegan crispy chicken sandwiches? Is it the carrots? The cherries? The new brand of spring water at work?