Neurology | December 1, 2020
Langeskov-Christensen M, Grøndahl Hvid L, Nygaard MKE, Ringgaard S, Jensen HB, Nielsen HH, Petersen T, Stenager E, Eskildsen SF and Dalgas U
Neurology. 2020 Dec 1;10.1212/WNL.0000000000011241
DOI: 10.1212/WNL.0000000000011241
Abstract
Objective To determine whether 24 weeks of high-intensity progressive aerobic exercise (PAE) affects brain MRI measures in people with multiple sclerosis (MS).
Methods We conducted a randomized, controlled, phase 2 trial (with a crossover follow-up) including an exercise group (supervised PAE followed by self-guided physical activity) and a waitlist group (habitual lifestyle followed by supervised PAE). Mildly to severely impaired MS patients aged 18–65 years were randomized (1:1). The primary outcome was percentage brain volume change (PBVC) after 24 weeks, analyzed using the intention-to-treat principle.
Results Eighty-six participants were recruited. PBVC did not change over the intervention period (mean between-group change +0.12%, 95% CI −0.27 to 0.51, p = 0.55). In contrast, cardiorespiratory fitness (+3.5 mL O2/min/kg, 2.0 to 5.1, p < 0.01) and annualized relapse rate (0.00, 0.00–0.07 vs +0.45, 0.28 to 0.61, p < 0.01) improved in the exercise group.
Conclusion These findings do not support a neuroprotective effect of PAE in terms of total brain atrophy in people with MS and it did not lead to a statistically significant difference in gray matter parenchymal fraction. PAE led to improvements in cardiorespiratory fitness and a lower relapse rate. While these exploratory findings cautiously support PAE as a potential adjunct disease-modifying treatment in MS, further investigations are warranted.
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