Aerobic exercise is basically long in duration yet relatively low in intensity.
You should be able to carry on a short conversation while doing aerobic exercise. If you re gasping for air, you re probably working anaerobically. When you work anaerobically you ll tire faster and are more likely to experience sore muscles after exercise is over. Aerobic exercise improves the performance of the heart and lungs. This is why aerobic exercise is often called cardiovascular exercise.