Stand upright shoulder-width apart next to a wall (chest parallel to the wall), fix an elasticated rubber band at ankle height, step into the loop of the band with the leg further away from the wall (right). Spread the training leg (right) out to the side to stretch/tension the elastic band (move the leg away from the wall). Then bring the leg back to the starting position.
Attention:
Do not lower the training leg completely (to a standing position) or keep it lifted off the floor at all times.
Lighten:
Choose an elastic band with less resistance.
Harden:
Choose an elastic band with greater resistance.