Toning or unstable footwear had been all the craze a decade ago. The promotors of these shoes made extraordinary claims for the shoe. These claims ranged from enabling weight reduction to reducing cellulite to toning the glutes to fixing sore backs. The footwear were built with a rocker on the bottom aimed at increasing muscle activity to obtain those presumed benefits. Unfortunately, the evidence just didn't back the alleged benefits and there was a great deal of litigation from disgruntled customers and several companies were required to make multi-million dollar settlements with the Federal Trade Commission.
While all of that is in the past you can find a few of these shoes available and they still do have some support from those people who are familiar with them. The shoes can alter the way that you move and then for some people that could sometimes result in an improvement in some things like sore backs. Similarly, it may make some people with low back pain feel more painful. There is a lot of research being directed at investigating exactly what the footwear do and exactly who will benefit from them and who may be harmed by them. Each person will likely respond in different ways the shoe.
Foot doctors seem to especially like these types of toning shoes due to the kind of patients that they see. The rocker sole design of the shoe means they are particularly useful for those with a painful great toe joint, as with these shoes the joint does not need to move as much. However, while that could be useful for that joint it will put more load on the ankle joint so could possibly create or make more painful issues at the ankle joint. It was problems like this that led to the legal issues previously and need to be carefully considered by anyone recommending or using these toning shoes. They do have their uses and they can be helpful for the right people with the appropriate issue.