The abductory twist is a characteristic of the way we walk which is frequently seen by podiatrists. Many people when they are walking, just as the rearfoot comes off the ground there is a rapid and small movement of the rearfoot medially (abduction). Many physical therapists do not look at this to be of much significance because it is just a symptom of an underpinning issue as opposed to a problem by itself.
There are several causes of this Abductory twist. The first is that the great toe joint needs to dorsiflex or bend just as the heel comes off the ground in order that we are able to move ahead. If that joint does not want to flex, then the foot will abduct to get around the block at the joint. Another common cause is overpronation of the foot. This is where the foot is rolling inwards at the ankle joint and the lower leg is externally rotating wanting to roll the foot outwards. When the heel lifts up off the ground the foot suddenly abducts due to the twisting.
A medial heel whip is another entity that does get confused with an abdutcory twist, but they are distinct. The twist occurs just as the heel lifts up off the ground and the whip is more of a circumduction of the entire foot as it comes of the ground. While the twist and whip are in the same course, they are very different things and caused by different issues.
The abductory twist does not have to be treated since it is not a problem on its own. It is due to something and that something is the reason for the problem, so that needs managing rather than just the abductory twist. The therapy will have to be directed at either the reason for a block in movement at the great toe or the reason for the overpronation of the foot. Consequently the therapy might take on a variety of possible alternatives, so there is no one treatment for it.