Adding ten minutes of walking to your day each day could extend your life. Researchers looked at 5,000 middle-aged and elderly US adults and found the risk of dying from any cause dropped as exercise levels increased. Just ten more minutes of moderate activity per day—such as a brisk walk—lowered deaths among people ages 40 to 85 by seven percent annually. The scientists estimate the small lifestyle change could save 100,000 lives in the US every year.