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Edinburgh, May 29: Spending extra hours in bed after a stroke or transient ischemic attack (TIA) could do more harm than good for memory and thinking skills, according to a new study published in Neurology. The research, conducted in Edinburgh and Hong Kong, highlights a surprising risk for stroke survivors: longer time in bed—whether sleeping or simply resting—may be linked to cognitive decline and worrying brain changes.
Study Details and Key Findings
Researchers examined 422 individuals, average age 66, who had recently experienced a mild stroke or TIA. One to three months after their event, participants completed sleep surveys, underwent brain scans, and took cognitive tests. The results were clear: those who spent more time in bed performed worse on memory and thinking assessments. Brain scans also revealed more white matter hyperintensities—areas of damage associated with dementia and higher stroke risk.
Other notable findings included:
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Increased signs of small vessel damage in the brain
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Higher prevalence of microbleeds (tiny brain hemorrhages)
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Lower overall cognitive function
These issues were observed even among participants who reported longer actual sleep duration, suggesting that simply spending more time in bed—regardless of sleep quality—was linked to poorer brain health.
Expert Insights
“Disturbed sleep may be a marker of poor brain health,” said Dr. Joanna M. Wardlaw, lead author from the University of Edinburgh. “While most people know that not getting enough sleep is harmful, there’s limited awareness about the downsides of too much time in bed, especially post-stroke”.
The study’s findings build on growing evidence that both sleep deprivation and excessive sleep can be problematic for stroke survivors. While quality sleep is essential for recovery, too much time in bed may signal or contribute to underlying brain changes that affect cognition and increase dementia risk.
Implications for Stroke Survivors
Stroke and TIA are serious events that require careful recovery and lifestyle management. This study suggests that, for survivors, more time in bed does not necessarily equate to better rest or improved recovery. Instead, focusing on quality sleep and maintaining a balanced daily routine may be more beneficial for cognitive and neurological health in the long run.
Dr. Wardlaw emphasized the need for further research to determine if improving sleep quality and reducing excessive in-bed time can help protect brain health after a stroke.
“We need more data to confirm if improving sleep quality and reducing excessive in-bed time can protect brain health post-stroke,” Dr. Wardlaw said.
The Bigger Picture
Stroke remains a leading cause of disability worldwide, with cognitive impairment affecting up to 30% of survivors within the first year. As the population ages and more people survive strokes, understanding how sleep and rest impact long-term brain health is becoming increasingly important.
Disclaimer: This article summarizes recent scientific research and expert opinions. It is not intended as medical advice. Stroke survivors should consult their healthcare providers before making changes to their sleep or recovery routines.
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