WONDER CORE Ab Roller with Elbow Support Rebound Abdominal Wheel for Core Workout, Ab Workout Equipment for Abdominal & Core Strength Training, Exercise Machines for Home Gym with Knee Pad

【4 Wheels Stable Workout Equipment for Abs】: Our ab roller machine won US Invention Patent in 2021, Patent No.:11,033,768, Certified by TÜV Rheinland in Germany in 2020, which is designed with four wheels to provide stability and prevent rolling over during workouts, ensuring safety and avoiding injuries. 【 Automatic Rebound Abdominal Wheel】: The abs roller features two-way automatic rebound technology that generates resistance when pushing forward or backward. It also automatically brakes when reaching 5 ft to prevent injuries. Beginners can easily control the roller as it generates power when pulling back. 【3 Workout Modes Abdominal Exercises Wheel】: This abdominal wheel offers three workout modes suitable for people of all ages and fitness levels. You can adjust the resistance devices on both sides for maximum rebound power, turn on one side for less rebound power, or turn off both sides for unassisted rebound exercises. 【Multifunctional Exercise & Fitness Equipment】: In addition to supporting abs workouts, this ab roller machine can be used for various exercises like ab tuck, ab roller, lower body exercise, bridge, plank, and more. It offers versatility and allows for a full-body workout. 【SLIDE FIT APP】: Download the "Wonder Core" and "Slide Fit" apps to access an online user manual, fitness guide, exercise analysis, training modes, and unique fitness games. Stay motivated and track your progress with these useful tools. 【Dimensions】The dimensions of this fitness board: The size of our exercise roller wheels is 11*17.32*4.72 inches when the handle is closed, and the size is 19.3*17.32*4.72 inches when the handle is open. Product weight: 8.38 LB