New research bolsters evidence that people with early signs of Alzheimer’s can take steps to slow the devastating neurologic disease — literal steps.

Researchers tracked nearly 300 older adults who had no cognitive impairment at the start of the study, measuring their memory and problem-solving skills, among other abilities, for up to 14 years. They also scanned their brains to monitor the build-up of beta-amyloid and tau, toxic proteins linked to disease progression.

The scientists found that patients who started with high levels of beta-amyloid, an early biological sign of Alzheimer’s, declined less if they were more physically active. Low or moderate levels of physical activity in this group, the authors reported, could slow cognitive decline by half compared with inactive individua

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