The Move: Twisting Sit-ups Angel-worthy abs (and obliques), anyone? This is just one way to get ‘em. The move: • Lie on your back with your arms by your sides, knees bent and heels on the floor, hip-width apart. • Brace your core and sit up, twisting to the left and reaching your right hand past your left knee. • Lower back down to the starting position and repeat, this time twisting to the right.