We chose this theme important nowadays because we want to interfere with the development of specific programmes pupils aged between 12 and 13 years to have a posture correct biomechanical point of view. Scientific article is made on a sample of 20 subjects, and the kinetoprophylaxy program includes 3 stages of 12 means for all the muscles of the back. The period during which the program has been conducted January-April 2019, two weekly sessions of 50 minutes. We believe the school is kinetic prophylaxies cifosis indispensable, even more students tend to sit leaning because of vicious positions from the bench and the engineer that is weighted with fractious, following a physical therapist should be present in any school to prevent physical deficiencies.Angle cifosis appears in conditions that destroying one or more vertebral bodies leading to a consolidation.„Arched” cifosis appears in the conditions affecting the spine on a larger expanse.