... Upper Body.3. Perform Effective Abdominal Crunches at ANY Fitness Level.4. Ab Burning & Oblique Busting. 5. Additional elbow supports 6 ... a more toned, flatter and more flexible core. Using this Dragon Sports AB Roller for only 10-15 minutes a day ... equipment and Children exercise equipment, such as treadmill, upright bike, fitness bike, recumbent bike, elliptical trainer, stepper, exercise bench, home ...