Twist Boards Are Designed To Tone Your Physique And Improve Balance. They Do This By Working Your Entire Core, Or Midsection. The Core Comprises Muscles That Support And Stabilize Your Body. These Include The Abdominals, Lower Back Muscles, Glutes, Hips, And Pelvis. Use Twist Boards As A Form Of Exercise To Help Burn Calories. Electronic Displays Show Calories & Number Of Turns