It is important to strengthen the muscles on the inside and outside of your ankle.
Position yourself sitting with your feet on the floor. Tie a theraband onto a stable structure and loop it around your foot. Start with the soles of your feet facing out. Finish with the soles of your feet facing in. Ensure that your knees are kept still. Repeat but with the therabnad looped over the opposite side of the foot.
Repeat 3x 10 times
Please be sure to speak to your physiotherapist before attempting the exercise