Moderate exercise improves cardiovascular function by enhancing the efficiency of the heart and lungs. This type of exercise increases heart rate, promoting better blood circulation and oxygen delivery throughout the body. Regular aerobic activities can strengthen the heart muscle, enabling it to pump blood more efficiently, which optimizes overall cardiovascular health. Additionally, moderate exercise aids in reducing blood pressure and cholesterol levels, significantly lowering the risk of heart disease. Furthermore, it enhances the body's ability to utilize fats and carbohydrates for energy, ultimately contributing to improved physical performance and endurance.