Remote Exercise Effects on Cognitive Processing Speed in Multiple Sclerosis: A Pilot Trial

Cognitive processing speed (CPS) impairment is prevalent, impactful, and poorly-managed in multiple sclerosis (MS). Upwards of 67% of patients present with MS-related CPS impairment, which is associated with poor everyday life outcomes. There are no FDA-approved pharmacological treatments for CPS impairment in MS. This landscape creates a critical public health and clinical crisis that underscores the importance of identifying efficacious approaches for managing CPS impairment in MS. We believe that aerobic exercise training represents a promising and powerful behavioral approach. This project involves a single-blind randomized controlled trial of 16-weeks of remotely-delivered and supported aerobic walking exercise training compared with an active control condition (remotely-delivered and supported stretching and toning activities) on CPS (assessed remotely) in 24 fully-ambulatory, but CPS-impaired persons with MS. This pilot trial will be conducted in a fully-remote fashion, such that there are no required in-person visits to Kessler Foundation. Participants (N=24) will initially undertake baseline assessments of CPS remotely via a HIPAA-compliant virtual platform (i.e., Zoom for Healthcare). This assessment will also serve as a screen for ensuring impaired CPS. At this virtual study visit, participants further will undergo a neuropsychological test of verbal learning and complete questionnaires assessing physical activity and MS symptoms via computer (REDCap). Following baseline, participants will be randomly assigned into the remotely-delivered and supported aerobic walking exercise training intervention condition (n=12) or remotely-delivered and supported attention and social contact control condition (n=12) using concealment. Both conditions will be administered remotely over 16-weeks via telerehabilitation by a postdoctoral behavior coach during scheduled calls. Participants will undertake aerobic walking exercise training or stretching-and-toning in the hom