The Ab Doer Twist abdominal exercise machine allows the user to sculpt their physique from home. Designed to tone your muscles, strengthen abdominals and your back region, burn calories - all while seated doing easy to follow, aerobic-like exercises! Targeted workouts: built to tone abdominal and back muscles and build fat-free muscles, the machine burns calories to refine areas such as the stomach and hips. Comfortable positioning: the device swivels 360 degrees and keeps users in an aligned and stable posture to deeply use rectus abdominis muscle and the obliques. The safe design includes a padded seat to prevent any loss of balance by supporting the arms and back. Complete program designed for success: users follow the exercises of John Abdo at their own rhythm with the included workout DVD. The DVD includes three workout programs for beginners, intermediate and advanced users. A knob adjusts the resistance level to increase the intensity of sessions. Features: - Combines muscle toning with aerobic training - 360-degree torsion-flex technology targets hard-to-reach muscles - Helps to tone upper and lower abs, obliques, and back muscles - Adjustable resistance - Built-in massage roller - Foldable for easy storage - Dimensions : 22 x 25 x 40.5 in - Maximum weight capacity: 300 lbs (136 kgs) The AB-Doer Tri-Roller triples the benefits of a single roller as it reaches all of the muscles of your back to give you a complete backrub. It's great for back and spine stretching. Features: - Massage accessory for Ab-Doer Twist - Replaces single massage roller pad - Easily reaches all the muscles of your back - Provides complete backrub and spinal stretch - Simple to install With the AB-Doer Extreme Workout DVD you'll never get bored and always be challenged. John Abdo and his AB-Doer team will guide you through the most motivating and diverse ABDOBICS workout session.