Start on the floor in a seated position with your hands placed behind you slightly wider than shoulder-distance apart. Extend your legs out in front of you, and lean back slightly. This will be your starting position.
Start by swinging your legs out to the side, then up towards your chest, and back down to the starting position. Essentially making a large circle. As you bring your legs towards you, lift your chest up, bringing it closer to your legs.
Alternate directions, moving clockwise to counterclockwise with each repetition. Try to keep your back straight and your abs engaged the entire time.
Complete for the recommended number of repetitions.
Tip: To make it easier, have a slight bend at the knees.