Lie flat on your back on a mat with your legs straight and your arms extended above your chest, holding a kettlebell in your hands.
Lift your head, shoulders, and legs about six inches off the ground. Avoid tucking your chin and focus your gaze at your navel.
From here, begin the movement by lifting your right leg higher than the left, about six feet off the ground. As you are lowering the right leg to the starting position (six inches off the floor), raise the left leg. This should be a fluid fluttering (or up and down) motion. Your feet should never touch the floor. This keeps tension in your core.
