Stand up straight on a polished floor.
Place a paper towel or slider under one foot.
Use shoes with a good grip if required.
Keep your posture up straight and your feet pointing forward.
Tighten your abdominal muscles and slide your foot on the paper along the floor out to the side.
Ensure you keep weight on this leg by taking your body with the movement.
Focus as you slide the foot along the floor back in towards your stationary leg.
You should feel the muscles in your inner thigh tense as you do this.