Whether you're an exercise newbie or a seasoned athlete, you need to change up your exercise routine from time to time. In this lesson, you'll discover how and why to do just that! You'll see how FITT principles, cross-training, exercise lite, and other techniques can help you develop and improve your workouts. Because your thoughts affect your actions and feelings, too, you'll learn how to become your own cheerleader in ways that make exercise easier, more effective, and fun.