There are lots of exercises which might be included in the rehabilitation of foot problems. The purpose of these exercises are to strengthen and stretch muscles as well as mobilize the joints. They are one of several tools which foot specialists make use of to deal with a wide range of foot conditions. One exercise which has been getting a lot of recent attention is one called the short foot exercise. This exercise is carried out weight bearing and the muscles in the mid-foot of the foot are contracted in order to shorten the foot. This is claimed to strengthen the arch of the foot. If you look at some of the rhetoric on the web concerning this exercise, it will fix almost anything that will go wrong with the foot, which is clearly far from the truth.
The major problem with this exercise is the blind faith and opinion that so many have that it can deal with so many of the conditions that might go wrong with the foot, when there is actually simply no research studies that it is a good choice for anything. Just stating that the short foot exercise is useful and hoping that is it does not allow it to be so. That's the logical fallacy of wishful thinking. For the short foot exercise to be effective it will take time to improve the strength. Plenty of problems improve with time, so there is not any way of figuring out if people improved just because of this natural history or because the short foot exercise does actually work. That will not suggest that there is something wrong with the exercise and that it ought not to be used. It could be that the exercise is a very helpful and good one. It just implies that the research studies have not been done and excessive faith must not be put in any intervention that does not have clinical research to underpin its use. By all means continue to use the short foot exercise, however use it in the understanding of these problems which are well known regarding it.