Epub: Motl et al. Longitudinal Change in Physical Activity and Its Correlates in Relapsing-Remitting Multiple Sclerosis. Phys Ther. 2013 Apr.
BACKGROUND: Physical activity is beneficial for MSers, but this population is largely inactive. There is minimal information on change in physical activity and its correlates for informing the development of behavioral interventions.
OBJECTIVE: This study examined change in physical activity and its symptomatic, social-cognitive, and ambulatory/disability correlates over a 2.5 year period of time in RRMSers.
METHODS: On 6 occasions each separated by six months, RRMSers (N = 269) completed assessments of symptoms, self-efficacy, walking impairment, disability, and physical activity. The participants further wore an accelerometer for 7 days.
RESULTS: There were significant linear changes in self-reported (p<.05) and objectively (p<.001) measured physical activity, self-efficacy (p<.05), walking impairment (p<.05), and disability (p<.001) over the 2.5 year period; there were no changes in fatigue (p=.70), depression (p=.80), and pain (p=.06). The changes in self-reported and objective physical activity were associated with change in self-efficacy (β=.49 & β=.61, respectively), after controlling for other variables and confounders.
CONCLUSION: Researchers and clinicians should consider designing interventions that target self-efficacy for the promotion and maintenance of physical activity in this population.