Also known as aerobic exercise, cardio is an important element of a balanced exercise routine. Cardio exercises speed up the fat loss, build your endurance and stamina, all while helping your heart, lungs, and muscles get healthier. As you get used to regular exercise, your body learns to use oxygen better. The results are amazing – if you exercise regularly, your resting heart rate and blood pressure get lower (cutting your risk of developing heart and circulatory disease), and it can even enhance your memory and attention span.