Cardiovascular exercises, often referred to as cardio, are physical activities that increase your heart rate and improve blood circulation. Common forms of cardio include activities like running, cycling, swimming, and walking. These exercises help strengthen the heart and lungs, making them more efficient at delivering oxygen to the body. Engaging in regular cardiovascular exercise can provide numerous health 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.