An Exercise Mimetic Approach to Reduce Poststroke Deconditioning and Enhance Stroke Recovery.
Matthew W McDonald, Matthew S Jeffers, Lama Issa and 8 others
PMID 33825581WHAT IT FOUND
In rats, resveratrol improved early balance and reduced compensatory gait, while delayed exercise restored cardiovascular fitness.
Neither intervention improved long-term balance more than the other, and the combination showed no additive benefit. These findings do not yet apply to human stroke recovery.
Key findings
01Resveratrol reduced acute hindlimb deficits on a beam traversal task at one week poststroke and prevented the development of compensatory gait strategies like increased shared stance time.
02Delayed exercise rehabilitation mitigated reductions in cardiovascular fitness and restored running distance to exhaustion to prestroke levels, whereas resveratrol did not improve aerobic capacity.
03There was no additive or synergistic effect when combining resveratrol and exercise; each intervention provided distinct benefits but did not enhance the other's impact on recovery.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study was conducted entirely in rats, so findings cannot be directly applied to human patients. Exercise was delayed until 10 days poststroke, which the authors note is likely suboptimal compared to earlier initiation windows. Resveratrol was administered for only 3 weeks, which may have been insufficient to improve aerobic capacity. The study did not measure the oxidative capacity of individual muscle fibers, limiting the interpretation of metabolic changes.
Declared interests
The authors declared no potential conflicts of interest. Funding was provided by the Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, the Canadian Vascular Network, and the Fundação de Amparo à Pesquisa do Estado de São Paulo.
The easy way to misread this
Do not interpret the improvement in rat gait and fitness as evidence that resveratrol or delayed exercise will improve human stroke recovery. The combination showed no additive benefit, and the physiological responses in rats do not guarantee similar outcomes in patients.