This is a *sit-up bench* or *ab crunch bench* also called an *abdominal decline bench*. It's gym equipment used for core workouts. *How it works:* - The curved blue pad is where you lie down - The black foam rollers lock your feet/ankles in place - You do sit-ups or crunches on the decline, which makes them harder than floor sit-ups *Main uses:* 1. *Sit-ups/crunches* - targets upper and lower abs 2. *Russian twists* - for obliques 3. *Leg raises* - if you flip around and hold the rollers