RecruitingBehavioural interventionEffectiveness of Task Specific Home Exercise ProgramThe purpose of this study is to compare the effectiveness of 2 different types of Home Exercise Programs (HEP) on mobility in persons with Multiple Sclerosis (MS). Specifically, we will be comparing the Standard of Care (SOC) a program based on aerobic conditioning and calisthenics to a Task Specific Program (TSP). Primary Question: Will persons with who receive a Task Specific HEP have greater improvement in mobility than those who receive the SOC? Secondary question: Will a task specific HEP be as well tolerated as the SOC HEP by persons with MS