主要材质：ABS+PE+铁+弹簧

每套都配有EVA 跪垫，使用说明书

The ab exercise roller will carve your core and help you get ripped abs and sculpted arms. The kinetic "engine" uses a carbon steel spring to turbocharge your abdominal and arm workouts. It provides resistance as you roll out and assistance when you roll back. The ultra-wide tread provides maximum stability when carving left, right, and center. Ergonomic hand grips are angled to help activate arm and core muscles. Download the digital workout to get a 21-day plan to a stronger core and sculpted arms. The workout is designed for all fitness levels, from beginner to advanced.