Write a strong conclusion to the following paragraph in one to two sentences.
We all know that exercise is essential for good health. People mostly focus on the kind of exercise they do. Recent research indicates, however, that the time intervals of your exercise are more important. For example, you might jog quickly for ten minutes, then walk briskly for ten minutes. You might spin quickly for two minutes, then slowly pedal for one minute. Researchers believe that changing the pace of exercise contributes to heart health.