Multi-functional Design: This Roman chair back extension training bench is designed for a variety of fitness movements targeting the abdomen, back, chest, buttocks, hamstrings, and core muscles for comprehensive training. Whether it's sit-ups, side bends, reverse crunches, or hyperextensions, you can easily complete them, helping you achieve full-body sculpting and strength improvement at home.safe and Reliable: Back extension machine made of high-grade steel and anti-scratch powder coating process, with a maximum load-bearing capacity of 330 pounds (about 150 kilograms), it is sturdy and durable, suitable for various high-intensity workouts. Whether you are a beginner or a professional fitness enthusiast, you can use it with peace of mind and enjoy a lasting stable fitness experience.