The main purpose of aerobic exercise is to improve the efficiency of the cardiovascular system, which includes the heart and lungs. This type of exercise enhances oxygen delivery and usage during physical activity, leading to better endurance levels. Aerobic exercises, such as running, swimming, or cycling, promote fat burning and improve stamina. Regular engagement in aerobic activities can also reduce the risk of chronic diseases like heart disease, diabetes, and obesity, all while contributing positively to mental health and overall longevity.