This study is about helping people with Multiple Sclerosis (MS) improve their balance and reduce falls. *Multiple Sclerosis* is a disease where the immune system attacks the brain and spinal cord. Participants will be exposed to "perturbations," which are unexpected movements like slips or trips, to help their bodies learn how to react better and prevent falls. *Perturbation training* helps the central nervous system (CNS), which controls most of the body and mind, learn new skills to stay balanced. **Key Points:** - The study lasts six months and involves several sessions where participants will walk on a treadmill and experience slips and trips. - Participants are split into two groups: one group gets training with perturbations and the other walks without them for comparison. - Participants need to be 45 or older, able to walk at least 25 feet, and stand independently for 30 seconds. This study is important because if successful, it could lead to new methods for preventing falls in people with MS. Participants will have their fall responses measured and monitored for effectiveness.