Fascinating science from cardiologist Dr. Jonathan Fisher, author of Just One Heart and GWI Breathe Initiative Member: This is an excerpt from his Newsletter: Depression changes how your heart beats. Not metaphorically—physiologically. When you’re depressed, your heart loses its natural rhythm variations. Instead of speeding up and slowing down flexibly throughout the day—responding to stress, relaxation, connection—it beats more rigidly, mechanically. This change, measured as…