The key characteristic of aerobic activity is rhythmical, continuous movement. Thus, in order to enhance aerobic endurance, a given activity must exhibit this key characteristic. For example, though bicycling may be an aerobic activity, coasting long distances ceases to become aerobic since you are not utilizing your muscles in a continuous fashion.

Regular aerobic training produces a more efficient cardiovascular system including the heart, lungs and blood vessels. From a practical point of view, you will experience more energy and a decreased perception of effort with any given workload.