You can perform this exercise in two different position - both provide the same result. The first position is while laying on your back in the deep area with the noodle under your arms and legs straight, slightly below parallel. The second is standing position, with straight back and noodle under your arms.
With both legs straight open as wide as you can, then close again together.
Feel your outer thighs as you open your legs and your inner thighs as you close.
Inhale as you push your legs out. Exhale as you push in.
Leg Circles in the Pool