Study aim: Determining the effect of twelve weeks of light aerobic exercise on cognitive and motor functions of women with non-severe MS Design: Clinical trial with two experimental and control groups, without blinding; Randomized by JPower software and used on 30 patients with MS. Settings and conduct: Exercises in the gym that are suitable for the physical conditions of MS patients, two sessions per week, and each session for one hour of light and sub-maximal aerobic exercise, for 24 sessions, under the supervision of an experienced trainer in compliance with all the conditions of these patients. will take Participants/Inclusion and exclusion criteria: eighteen to forty years old • Female gender • The physical disability score of non-severe MS patients based on the EDSS scale is up to 5.5• Not having underlying diseases • Not taking any medicine other than the medicine needed to treat MS • Not engaging in any sports and physical therapy activities at the same time as conducting this research Exit criteria • Any dissatisfaction due to exercises • Two sessions of continuous absence or three sessions of intermittent absence Any injury to the subject due to exercises • The option to leave the test at any time, by the examinee • Criteria for not entering the research The presence of any underlying disease, including epilepsy and... • Taking certain drugs other than drugs related to MS disease Intervention groups: After the call, qualified people will be selected and then randomly placed in two groups. Two groups will be given a pre-test, then the experimental group will be subjected to an intervention program for 12 weeks, and at the end, both groups will be given a post-test. . Main outcome variables: Impact on the amount of dynamic balance factors; static; flexibility ; reaction time; Memory ; two-handed coordination; Fatigue rate of patients