who assessed balance following ball exercises and treadmill training in adult persons with intellectual disability. There was a lack of improvement noted in both postural and balance control in those subjects as a result of 6 months of intervention. With respect to study group II who received suspension therapy via using spider cage, there was significant improvement in the mean values of stability indices. This improvement in the study group II may be attributed to the use of spider cage. It provided more stabilization to the child which minimized the displacement of center of pressure (COP) under each foot, so keeping the COP near the middle. In addition to that, it helped the child to keep small amplitude of COP motion and decrease postural sway which reflected a good balance control and tended to achieve quiet stance