Final answer:
Regular exercise and physical activity can lead to a lower resting heart rate as the heart becomes more efficient at pumping blood.
Step-by-step explanation:
Your resting heart rate will get lower as you get more fit. This is true because regular exercise and physical activity can strengthen the heart muscle, allowing it to pump more efficiently. When you are fit, your heart doesn't have to work as hard to supply oxygen and nutrients to the body, leading to a lower resting heart rate. For example, if someone regularly engages in cardio exercises such as running or swimming, their heart muscle becomes stronger and can pump more blood with each beat, resulting in a lower heart rate.
Learn more about Resting heart rate and fitness