A sit up bench is designed for intense abdominal exercises during which you can aspire to have rippling abs as a result. It can also be used for chest presses, and other different kinds of exercises. Sit up benches include a padded backrest and support pads that provide maximum comfort and stability during exercises. Much safer: Sit-up benches are considered to be much safer than performing exercise on the floor. As it provides you with a padded back support with reduces the risk of injury. You can repeat certain exercises on sit-up benches stress-free without having the fear of injury According to Harvard Health Publications, sit-ups can be very hard on the spine and potentially damaging. If you have ever felt lower back pain and strain during a sit-up, you know this already. A sit-up pushes the curved spine against the floor, and as mentioned earlier, employs the hip flexor muscles.