Abstract

BackgroundPhysical activity can improve brain health in people with multiple sclerosis (PwMS). One of the underlying mechanisms can be the modulation of gut bacteria. The association of different intensity of physical activity in a lifetime; and brain volume, lesion volume, and number, and gut bacteria counts were investigated in the current study. MethodsForty-five PwMS were recruited, and magnetic resonance imagining was used to evaluate brain volume, lesion volume, and number. Also, stool samples were taken for evaluation faecalibacterium prausnitzii, akkermansia muciniphila, prevotella, and bacteroides count. Moreover, lifetime physical activity was assessed using the adapted version of the historical activity questionnaire. ResultsData revealed a significant association of physical activity with brain volume (r = 0.41), lesion volume (r=-0.35), lesion number (r=-0.37), akkermansia muciniphila (r=-0.34), prevotella (r = 0.52) and bacteroides (r=-0.32) count (p<0.05). Moderate-intensity of physical activity was associated with brain volume (r = 0.33), lesion volume (r=-0.38), prevotella (r = 0.35) and bacteroides (r=-0.40) count (p<0.05). Moreover, vigorous-intensity of physical activity was associated with brain volume (r = 0.38), lesion number (r=-0.39), akkermansia muciniphila (r=-0.30) and prevotella (r = 0.56) count (p<0.05). ConclusionOur results suggest that lifetime physical activity is associated with brain health and gut bacteria count in PwMS. Additionally, the heterogeneity of the association of the physical activity intensities with the studied variables indicates the importance of using different intensities of physical activity to greater benefit from physical activity.

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