Rosalie C we're sorry for the delay in answering your question. We asked our teacher Ilaria Cavagna, who is educated on this topic. She suggests that they need both stretching (to release the scar tissue) and they also need to reinforce the foot and ankle. But everything should be done very gently and progressively. It might be nice to team up with a chiropractor or physical therapist because manual treatment and exercise is ideal. We hope this helps!