Cardio exercise, short for cardiovascular exercise, refers to any physical activity that raises your heart rate and improves the efficiency of your heart and lungs. Common forms of cardio include activities like running, cycling, swimming, and walking. These exercises help increase blood circulation, which can enhance overall health and endurance. Engaging in regular cardio exercise can provide numerous benefits, such as weight management, improved mood, and reduced risk of chronic diseases like heart disease and diabetes. It is generally recommended to aim for at least 150 minutes of moderate-intensity cardio each week for optimal health benefits.