“…Although multiple factors may be involved in its genesis, when it occurs among athletes it is currently considered to be a stress fracture. 2,3,6,10,11,17,18 The literature contains numerous epidemiologic studies that report the prevalence of spondylolysis among athletes as being three to four times higher than that among the general population, 1,2,5,6,8,11–13 and that highlight the causative relationship between sport and lysis. There is general agreement that sports movements that require lumbar hyperextension or extension and rotation 1–3,10,19 constitute a risk with regard to the development of these lesions, especially in the case of an immature spine.…”