Just walking 3,000 to 5,000 steps daily may slow early-stage Alzheimer's in older adults, a new study has found.

Researchers from the Harvard Aging Brain Study and Mass General Brigham found that walking 3,000 to 5,000 steps per day was linked to an average three-year delay in cognitive decline, while walking 5,000 to 7,500 steps daily corresponded to a seven-year delay.

Published in Nature Medicine, the study tracked 296 cognitively unimpaired participants aged 50 to 90 over an average of 9.3 years.

Participants wore pedometers to measure daily physical activity, and PET brain scans were conducted to assess tau and amyloid-beta protein levels, biomarkers associated with Alzheimer’s disease.

The study found that higher daily step counts were significantly associated with slower tau bui

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