Effects of Cognitive Behavioural Therapy and Exercise on Stress and Cognitive Deficits in Multiple Sclerosis

"CBT will be delivered individually, 1 hour per week, for 12 consecutive weeks. CBT for stress in MS is a structured, short-term, present-oriented therapy with an emphasis on problem-solving and the modification of dysfunctional thinking and behaving. Cognitive strategies include the use of dysfunctional thought records for recording and challenging negative automatic thoughts and the use of behavioural strategies to increase involvement and commitment to personal goals.~Group therapy following a similar protocol (2 hrs/week) will be offered to those in the waitlist condition after completing the study."

Aerobic exercise will occur three times per week at participating gyms. Duration of the exercise periods will be 15-30 minutes for the first 4 weeks (training stage) and 30-45 minutes for the remaining 8 weeks (improvement stage). The exercise regimen will progress from light-moderate exercise (40-60% intensity) to moderate-high exercise (60-80% intensity), following the same course as the increase in duration.