Femoroacetabular impingement (FAI) is an interference fit between the femoral head-neck junction and the labrum of the acetabular rim caused by a morphological deformity. FAI induces a jamming sensation correlating to pain and early osteoarthritis. It is most often attributed to one’s genetics, skeletal maturation, or to a congenital deformity. It has been long thought that significant athletic activity before skeletal maturity exacerbates impingement. Since impingement occurs at extreme range of motions, the risk is increased in young adults who engage in sports requiring wide hip movement. Bone is maintained through a coupled process of bone resorption and bone formation, in a continuous process called bone remodeling4. Wolff’s law simply states that every change in function of a living bone is followed by adaptive changes in its internal architecture and shape. Applying the underlying Wolff’s law, it is hypothesized that bone adaptation is stimulated at the head-neck region to absorb the repeated impact during dynamic movements and to equilibrate the mechanical stimulus within the femoral head. The objective is to provide an explanation for the morphological development of cam types of FAI on the basis of Wolff’s law and bone remodelling theories.