Product Condition: This is a used item. There are rust and dents. While I have cleaned it with disinfectant wipes, used toothpicks, and disposable chopsticks, there may be some remaining dirt that couldn't be removed. Product Overview: ■ Compact Abdominal Machine Just 30 seconds! This is the only abdominal machine that lets you do sit-ups just by falling back, exceeding common sense. It's more compact than before, so you can tighten your entire body at home, regardless of age or physical strength, and enjoy exercising. ● Supports maximum effect with efficiency-focused resistance system The backrest's resilience stimulates your abdominal muscles both when you fall back and when you sit up. Your abdominal area will tighten in just 30 seconds. ● 180-degree full-range system that pushes your entire core to its limits Because you can lean back 180 degrees, your entire core is contracted to its limit. ● 8-in-1 multi-functional machine Not only for sit-ups, but you can also use it for "bridge" exercises to train your back, and for full-body exercises like aerobic exercise while sitting in a chair. This one machine can do it all. Use it for just 30 seconds! With simple exercises like falling back on the backrest and sitting up, you can effectively train your abdominal muscles. "Support Resistance System" for efficient exercise When you lean on the backrest, there is a spring-like resilience. This reaction stimulates the abdominal muscles when you sit up, resulting in a tightened abdominal area in just 30 seconds. 180-degree full-range system The backrest can recline 180 degrees, allowing you to contract the entire core muscles to their limit. Scientific studies have shown that exercising with this "Wonder Core" has more than twice the training effect compared to doing sit-ups on the floor. Not just sit-ups! Usable for various full-body training Not only for sit-ups, but it can also be used for full-body exercises depending on the arrangement. "Forearm & Bicep" which involves pushing the backrest with both arms, is for forearm and upper arm exercises, and "Bicycle" which involves sitting in a chair and stepping on the backrest with your feet, is for training your thighs and lower abdominal muscles... With different uses, you can use it for 8 different full-body exercises. ■ Dedicated twist board that trains the oblique abdominal muscles Just 30 seconds! The Wonder Core exclusive accessory twist board trains the oblique abdominal muscles! The twisting motion of your feet puts a load on the transverse abdominal muscles, which is effective for tightening your waistline and creating a defined waist. Thank you for viewing. Type...Abdominal Machine