We all know exercise is good for your heart—but what about your face? Here’s how movement affects your skin from the inside out—and why it’s not just about sweat. After 40, your skin doesn’t just age—it changes how it works. You might notice it takes longer to bounce back from dryness. Fine lines appear more easily. Your glow seems to fade no matter how hydrated you stay. The truth is, mature skin isn’t just drier—it’s less responsive. That’s because, as we age, the skin’s internal functions b