According to the Mayo Clinic, adults should do 30 minutes of "moderate physical activity" every day. Fortunately, there are a variety of ways to get your heart pumping. You could go outside for a jog, watch a kickboxing video on YouTube, or opt for calisthenics. Why is it so important to keep your body active? More importantly, what exactly happens to your body when you make the effort to get 30 minutes of cardio every day? Read on to discover the answers to those questions and more.