Just 3,000 steps a day may help slow Alzheimer's, scientists find
Research suggests that walking as few as 3,000 steps daily can help reduce the accumulation of tau proteins associated with Alzheimer's disease in older adults. While physical activity does not eliminate amyloid plaques, it appears to significantly lower the risk of cognitive decline.
Why it matters
It offers a low-barrier, actionable lifestyle intervention for dementia prevention, challenging the necessity of the 10,000-step standard.
A new study suggests that even low levels of physical activity could protect the brain from Alzheimer's disease - but not in the way scientists expected.
The researchers tracked almost 300 older adults with early brain signs of Alzheimer's for nine to 11 years using pedometers. They found that physical activity didn't reduce the toxic amyloid plaques that most Alzheimer's treatments now target.
Instead, in people who already had these plaques, physical activity reduced the accumulation of misfolded tau proteins in specific brain areas. These proteins appear later in Alzheimer's disease and are more closely linked to cognitive and functional decline. These signs of dementia were reduced by almost half in more active participants.
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