**Motor Learning of Fall Resistant Skills in MS Study** This study looks at how people with multiple sclerosis (MS) can learn to avoid falls through special training. Multiple sclerosis is a disease affecting the brain and spinal cord, causing problems with muscle control. The training involves learning new motor skills by practicing how to respond when slipping or tripping. The central nervous system (CNS) helps us learn these new movements by adapting through practice. Participants are split into two groups: one group practices slipping and tripping on a treadmill, while the other just walks on it. Both groups will test slipping and tripping on the ground, too. The study lasts for about six months, with follow-up tests at three and six months. **Key Points:** - Participants need to be at least 45 years old and able to walk 25 feet. - They must not have had any prior perturbation training or recent MS relapse. - The study will monitor falls over six months to see if the training helps prevent them. This research could lead to better fall prevention methods for people with MS. **Eligibility:** Participants must have MS, be at least 45 years old, and meet certain health criteria.