Measuring Neuroplasticity in Response to Cardiovascular Exercise in People With Stroke: A Critical Perspective.
Bernat De Las Heras, Lynden Rodrigues, Jacopo Cristini and 5 others
PMID 38291890WHAT IT FOUND
Current biomarkers for measuring neuroplasticity after cardiovascular exercise in stroke survivors are inconsistent and rarely linked to functional recovery.
While exercise shows promise, no specific marker reliably predicts clinical benefit, so treatment decisions should remain based on patient function rather than biological measures.
Key findings
01Most studies examining biomarkers used small sample sizes and lacked rigorous control groups, limiting conclusions about causality.
02Changes in biomarkers such as brain activity or blood factors were rarely associated with improvements in functional recovery.
03There is no consensus on which biomarker best captures neuroplastic changes in response to cardiovascular exercise.
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 review itself is not a primary study; it summarizes existing evidence which is largely heterogeneous and low quality. Most included studies had small sample sizes (78% with n ≤ 30), reducing statistical power. Only 41% of the reviewed studies were randomized controlled trials with non-exercise controls, making it difficult to isolate the effect of exercise from other factors. There was a selection bias in the reviewed studies, with most participants having mild disability, so findings may not apply to more severely impaired patients. The vast majority (95%) of studies focused on chronic stroke, leaving a gap in knowledge for acute or subacute recovery stages.
Declared interests
The authors declared no potential conflicts of interest. Funding was provided by doctoral scholarships and salary awards from Quebec and Ontario research foundations (FRQS and OGS).
The easy way to misread this
Do not interpret the reported changes in biomarkers (such as increased BDNF or altered brain activity) as proof that cardiovascular exercise causes functional recovery in stroke survivors. The review explicitly states that these biological changes were rarely associated with improved patient outcomes, and the evidence is too inconsistent to support clinical decision-making based on these markers.