Reduce Fatigue and Tone Your Body Having a strong core will influence your overall fitness performance more than any other muscle group. The core, or trunk, of your body is your center of gravity. Strong core muscles like your abdominal, back and pelvis will allow you to keep the ideal alignment for whatever you're doing (losing weight, running, biking or even walking), and this in turn will reduce your fatigue and tone your body. GoFit has a series of products designed specifically for core muscle workouts. 6" X 18" High Density Foam Roller. To be utilized as recommended in the Performance Book. Includes a Training DVD. | 
