Starting Position: Lie on your side on an exercise mat with your legs extended and the left leg lying directly on the right. Bend your right leg to 90 degrees of flexion while keeping the left leg extended, with the inside surface of your left foot making contact with the mat. Raise your upper body to support yourself on your right arm, with your elbow bent to 90 degrees and positioned directly under your shoulder. Align your head with your spine and keep your hips and right knee in contact with the exercise mat.
Upward Phase: Exhale, gently contract your abdominal / core muscles to stiffen your spine and lift your hips and right leg off the mat. Your head should be aligned with your spine and your right elbow should remain positioned directly under your shoulder.
Lowering Phase: Inhale and gently return yourself to your starting position. Switch sides and repeat.
Exercise Variation: Increase the intensity of the exercise by increasing the length of time you are in the raised position.
Any excessive pressure on the inside of your upper foot or upper knee may cause undesirable stresses on those joints and merits termination of this exercise.