This exercise is preparing the lower body for the Classic Pilates Swimming exercise.
To do this exercise you will need a mat. Start by lying on your belly. Make a pillow for your forehead with your hands. Inhale as you prepare and then exhale as you hollow your abdomen, reach your big toes away from you and allow both thighs to float into the air. Continue breathing as you lift one leg higher and then the other. Continue alternating legs until you feel a gentle burn at the top of your hamstrings
Things to think about
If you have tight hip flexors, be sure that you are pressing the pubic bone into the ground and asking for length in the front of your hips. This can help you use the hamstrings to release the hip flexors.