Leg spasticity is common problem encountered with a large proportion of patients suffering with multiple sclerosis (MS) with an increasing severity as the disease progresses. It mostly affects the antigravity muscles that significantly complicates transfer, increases fatigue and makes walking more difficult. Hence, leg spasticity often interferes with patients' mobility and significantly influences their quality of life. A great number of multidisciplinary rehabilitation studies has shown a significant effect of numerous specific functional changes in patients with secondary (SP) and primary progressive (PP) MS but there are no reviews related to spasticity. The positive therapeutic effect of modulating Transcranial Magnetic Stimulation ( TMS) methods on spasticity is shown in only two studies, in patients with relapse remitting clinical form in the remission phase of the disease. The effect of TMS on clinical measures of lower limb spasticity, functional inability and the quality of life in patients with SPMS and PPMS will be examined in this study. The objective to this study are to to explore whether rTMS boosted exercise therapy (ET) treatment can bring more improvement in lower limb spasticity than ET treatment alone in these patients.