Sit Up Bench, egymcom Adjustable Abdominal Decline Bench Slant Board/Abs Workout Equipment Adjustable sit up bench & decline bench. Measures 46L x 19W x 25H inches, 250-pound maximum user weight. A curve design which helps in supporting the natural curvature of your lower back, which will help in preventing lower back pain which is common if using the flat benches. It features an ultra-thick back cushion which is two inches thick and provides extra support to the spine for a more efficient workout. Both an incline and decline bench, depending on where you position your body and head, with five incline positions for comfortable and efficient twists, crunches, sit ups, and reverse crunches for your core area. It comes with a pair of resistance bands which help in boosting your strength training.