The primary aim of the proposed pilot RCT involves examining the efficacy of a 16-week behavioral intervention for increasing physical activity and reducing RLS severity in persons with MS and RLS. Secondarily, the investigators will be assessing changes in sleep quality and daytime sleepiness following the behavioral intervention. The study includes a proposed sample of 20 persons with MS and RLS that will complete a baseline testing session for measures of physical activity, restless legs syndrome severity, sleep quality, and daytime sleepiness. Participants will then be randomized into one of two study arms: (1) a 16-week Social Cognitive Theory-based behavioral intervention aimed at increasing physical activity; or (2) 16-week waitlist control with the option of completing the intervention upon completion of the study. All participants will complete a follow-up testing session at the conclusion of each 16-week arm.
