Stand beside the edge of the pool. Step on the noodle with your far leg (far from the edge). Hold the edge with straight arm. Keep your back straight and your far leg slightly in front of your body.
Move your far leg in a breast-stroke motion:
1.bend your knee to the side;
2. wide open your leg;
3. straight leg close.
Inhale as you open your leg. Exhale as you close.
Feel your quadriceps as you open and your inner thighs as you close.