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Old 03-24-2020, 04:50 PM
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Default Exercise-induced neuroplasticity in secondary progressive MS

J Neurol Phys Ther. 2020 Apr;44(2):132-144. doi: 10.1097/NPT.0000000000000308

Exercise-Induced Brain Excitability Changes in Progressive Multiple Sclerosis: A Pilot Study.

Chaves AR, Devasahayam AJ, Kelly LP, Pretty RW, Ploughman M.

Abstract

BACKGROUND AND PURPOSE:
Even a single bout of aerobic exercise (AE) enhances corticospinal excitability (CSE), a biomarker of neuroplasticity. Because neurodegeneration limits capacity for neuroplasticity, it is not clear whether AE would induce CSE changes in people with progressive multiple sclerosis (MS).

METHODS:
People with progressive MS (n = 10) requiring ambulatory assistive devices completed a graded maximal exercise test. Dual-energy x-ray absorptiometry was used to quantify body fat and lean mass. Before and following one 40-minute AE session using body weight-supported (<10% support) treadmill at moderate intensity, CSE was measured using transcranial magnetic stimulation. Variables included resting and active motor thresholds, motor evoked potential (MEP) amplitudes, recruitment curves, and length of the cortical silent period (CSP).

RESULTS:
Aerobic exercise reduced inhibition (shorter CSP) and increased excitation (increased MEP amplitude) only in the hemisphere corresponding to the stronger hand. Controlling for age, higher fitness and lower body fat significantly predicted exercise-induced reduction in resting motor threshold (ΔR = +0.458, P = 0.046) and CSP (ΔR = +0.568, P = 0.030), respectively.

DISCUSSION AND CONCLUSIONS:
Despite high levels of disability, capacity for exercise-induced neuroplasticity was retained among people with progressive MS. The hemisphere contralateral to the weaker hand was resistant to exercise-induced CSE changes, suggesting less neuroplastic potential. Lower fitness and higher body fat were associated with diminished exercise-induced CSE benefits, suggesting that therapists should consider interventions aimed at improving fitness and combating sedentarism to ultimately enhance the benefits of exercise on the brain.

Video Abstract available for more insights from the authors (see the Video, Supplemental Digital Content 1, available at: http://links.lww.com/JNPT/A302).
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Old 03-27-2020, 10:50 PM
ThailandVal ThailandVal is offline
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I like the video. The results affirm what many of us knew, that exercise is good for your brain
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