RESUMO
BACKGROUND: Internet-delivered, behavioral interventions represent a cost-effective, broadly disseminable approach for teaching persons with multiple sclerosis (MS) the theory-based skills, techniques, and strategies for changing physical activity. OBJECTIVES: This pilot, randomized controlled trial examined the efficacy of a newly developed Internet website based on e-learning approaches that delivered a theory-based behavior intervention for increasing physical activity and improving symptoms, walking impairment, and neurological disability. METHODS: Participants with MS (N = 47) were randomly assigned into behavioral intervention (n = 23) or waitlist control (n = 24) conditions delivered over a six-month period. Outcomes were administered before and after the six-month period using blinded assessors, and data were analyzed using analysis of covariance in SPSS. RESULTS: There was a significant, positive intervention effect on self-reported physical activity (P = 0.05, [Formula: see text] = 0.10), and non-significant improvement in objectively measured physical activity (P = 0.24, [Formula: see text] = 0.04). There were significant, positive effects of the intervention on overall (P = 0.018, [Formula: see text] = 0.13) and physical impact of fatigue (P = 0.003, [Formula: see text] = 0.20), self-reported walking impairment (P = 0.047, [Formula: see text] = 0.10), and disability status (P = 0.033, [Formula: see text] = 0.11). There were non-significant improvements in fatigue severity (P = 0.10, [Formula: see text] = 0.06), depression (P = 0.10, [Formula: see text] = 0.07) and anxiety (P = 0.06, [Formula: see text] = 0.09) symptoms, and self-reported disability (P = 0.10, [Formula: see text] = 0.07). CONCLUSIONS: We provide evidence for the efficacy of an Internet-based behavioral intervention with content delivered through interactive video courses grounded in e-learning principles for increasing physical activity and possibly improving secondary outcomes of fatigue, depression, anxiety, and walking impairment/disability in persons with MS.
RESUMO
Cognitive impairment is common and debilitating among persons with multiple sclerosis (MS) and might be managed with exercise training. The present pilot study adopted a single-blind randomized controlled trial (RCT) design and is the first to examine the effect of a systematically developed, progressive treadmill walking exercise training intervention on cognition among fully ambulatory persons with MS. Ten fully ambulatory females with MS were randomly assigned into exercise training intervention or waitlist control conditions. The intervention condition involved 12 weeks of supervised, progressive chronic treadmill walking exercise training. Participants underwent measures of cognition (i.e., cognitive processing speed (CPS), executive function), walking performance, and cardiorespiratory fitness before and after the 12-week period; baseline and follow-up assessments were performed by blinded assessors. Overall, there were large intervention effects on CPS (d = 0.95), walking performance (d = 0.76), and cardiorespiratory fitness (d > 1.08). The change in cardiorespiratory fitness was significantly associated with change in CPS (r = .60), but not walking performance. This small pilot RCT provides preliminary proof-of-concept data supporting progressive treadmill walking exercise training for potentially improving CPS, walking performance, and cardiorespiratory fitness in fully ambulatory persons with MS, and that improved fitness might be a possible mechanism for improved CPS.
