Your heart has a molecular pump called SERCA that cycles calcium to make each beat happen. Exercise makes this pump work better and express more, which strengthens how your heart handles calcium and makes the muscle itself more resilient.
Did you know there's a pump inside your heart? No, no, not your heart itself. Inside your heart. And exercise actually makes it stronger. Here's how it works. Every time your heart beats, muscle cells contract, and that contraction depends on calcium. Calcium flowing in and out of little storage depots inside cells. And when calcium is in the right position, it allows long strands of proteins, myosin and actin, to slide together and boom, muscles contract. This happens with every single heartbeat, every single one. And the waves of calcium that make this possible, they're driven by a molecular pump called the SERCA pump. And guess what? Exercise makes SERCA stronger. So bottom line, exercise doesn't just make your heart beat harder, it reprograms your heart at a deep molecular level. And if that didn't blow your mind, check out the link below because that definitely will.
