''The effect of a physical rehabilitative program on range of motion and pain reduction for a dysfunctional sacroiliac joint Experimental study of non-athletic men aged (45-50)''.

This research aims to design a physical therapy rehabilitation program for individuals with sacroiliac joint dysfunction and to determine its effect on the flexibility of the lumbosacral vertebrae and the degree of pain during static and dynamic activities. The researcher employed an experimental approach, deemed suitable for the nature of the research, by designing a single experimental group using pre-, mid-, and post-test measurements. The research sample was selected purposively and consisted of five non-athletic males with sacroiliac joint dysfunction, aged between 45 and 50 years. The researcher used a visual symmetry scale to measure pain intensity and a flexible measuring tape to measure the range of motion of the lumbosacral vertebrae in four directions (anterior, posterior, right lateral, and left lateral). The program was developed in four phases, with a total duration of eight weeks. The first two phases each consist of four weeks and comprise 16 rehabilitation units, implemented at a rate of four units per week. The third and fourth phases consist of four weeks each, comprising 16 rehabilitation units implemented at a rate of four units per week, for a total of 32 rehabilitation units. The researcher reached the following conclusions: There are differences between the pre-test, follow-up, and post-test measurements, favoring the post-test measurements, in each of the following: pain level during static and dynamic states, and range of motion of the lumbosacral vertebrae in the four directions (anterior, posterior, right lateral, and left lateral).