1.Ergonomic comfort: padded components and adjustable positions ensure the correct shape and minimise the strain on your joints during training. 2.Full body training: This versatile training device provides comprehensive training for your entire body while trains multiple muscle groups. 3.Improved ab roller board: This abdominal roller board goes beyond the conventional ab roller with its versatility and meets the requirements of a variety of exercises. It is not only limited to standard abdominal exercises, but can also fully train core strength, glutes, back muscles and balance ability. 4.Automatic rebound: This ab roller uses advanced autorebound technology to make your movements smoother and more effective. It consists of a 50 lb thick silicone elastic band and provides strong rebound force. Easily train your core muscles without extra pressure. Suitable for fitness beginners or experienced athletes.