Abstract
Background: Aerobic exercise can improve cognitive performance in healthy elderly people. Objective: The aim of this study was to investigate the influence of a 3-week high-intensity aerobic exercise programme (high-intensity training group (HIT)) on cognitive performance in persons with multiple sclerosis (MS) compared with a standard exercise programme (control training (CT)). Methods: A total of 60 persons with MS (Expanded Disability Status Scale (EDSS): 1.0–6.5) were randomized to a HIT group (3×/week for 20 minutes, including five 3-minute exercise intervals at 80% of peak oxygen uptake (VO2-peak)) or a CT group (continuously 5×/week for 30 minutes/session at 65% of VO2-peak). Cognitive performance was assessed using the Brief International Cognitive Assessment for MS at entry (t0) and discharge (t1). Furthermore, VO2-peak, brain-derived neurotrophic factor, serotonin and matrix metalloproteinases (MMP)-2 and -9 were measured. Results: Compared to CT, HIT significantly improved verbal memory. Significant improvements over time in executive functions were found in both groups. Secondary outcomes indicated significant improvements in VO2-peak and a significant reduction in MMP-2 in the HIT group only. Conclusion: HIT represents a promising strategy to improve verbal memory and physical fitness in persons with MS. Further research is needed to determine the impact of exercise on biomarkers in MS.
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