Can inactivity worsen memory problems? Yes, research shows that a lack of physical activity can make memory issues worse, especially in older adults at risk for dementia or cognitive decline. Staying inactive harms brain health, while regular movement helps protect and even improve memory.
Scientists have found clear links between sitting too much and higher risks of dementia and stroke. For example, one large study using data from the UK Biobank looked at over hundreds of thousands of people. It showed that more sedentary time, like prolonged sitting, raises the chances of developing dementia. People with fewer healthy habits, including low physical activity, had up to twice the risk compared to those who stayed active. Grip strength, a sign of overall fitness, also mattered, with stronger people facing lower risks.
A 2025 study in the Journal of the American Medical Association followed 2,011 adults aged 60 to 79 who were at high risk for memory problems due to things like inactivity or poor diet. Everyone got advice to eat better, move more, stay social, and keep their minds sharp. After two years, both groups saw memory and thinking skills improve. But the group with structured support, like group sessions and check-ins, improved even more. This proves that inactivity speeds up decline, but adding exercise and activity can reverse some damage.
Wearable devices, like fitness trackers, give more proof. A study measured real daily activity and sleep in healthy adults. It found that higher levels of physical activity directly boosted memory test scores. Low activity hurt recall, while moderate exercise sharpened it. Sleep played a role too, but movement stood out as key.
Everyday choices count. The brain thrives on motion. Skipping walks, gym time, or even standing breaks lets problems build. Older adults with family history of dementia or early forgetfulness benefit most from starting now. Simple steps like daily walks cut risks and sharpen focus.
Sources
https://www.orthopedicsri.com/blog-items/dementia-research-can-lifestyle-factors-reduce-the-risk-of-cognitive-decline/
https://pmc.ncbi.nlm.nih.gov/articles/PMC12729355/
https://pmc.ncbi.nlm.nih.gov/articles/PMC12728405/
