The purpose of this article is to describe the mechanisms that ensure the stability of the hip joint. In the first part, the passive and active control subsystems are explained, as well as the controlling function of the nervous system. This feed-forward mechanism protects the musculo-skeletal system from dangerous overuse in both static and dynamic conditions. The second part of the article gives the main rules for therapeutic intervention and some examples of stability exercises that can be used in cases of coxartrosis deformans.