The American Council on Exercise recommends adding variety to your fitness routine to prevent boredom (one of the main reasons people quit exercise programs) and to avoid fitness plateaus. Your body is smart and learns to adapt to an exercise program within approximately six to eight weeks. If you do not add variety to your fitness training routine, your workouts may not be as effective as they once were because your body has adapted to the repetitive training stimulus. To achieve your weight loss and fitness goals, I recommend incorporating barre, strength training, HIIT and more to your fitness routine.