Sit on a flat bench and place a pair of dumbbells on your legs. Throw them up using your legs and lie on the bench while holding the dumbbells next to eachother.
2. Push your heels to the ground and flex your abs to stay still.
3. Slowly lower the dumbbells by bending your elbows towards your stomach while keeping them close to your sides.
4. Pause briefly at the bottom and extend your elbows back to the starting position.