Isolating your abdominal and ableak muscles the DB4 bench concentrates your training solely on your target areas. The great thing about this bench is that you can rotate or sit up twisting concentrating your muscles to develop in your targeted areas. This bench is great as sit up bench, however also as good in conjunction with weights, increasing resistance when doing sit ups. Excercises this bench enables you to do: Incline shoulder press, Flat flys, Decline shoulder press, sit ups.