Walking 5,000 steps per day delays cognitive decline

Walking 5,000 steps a day may delay cognitive decline by about three years, and 7,500 steps a day could slow it by seven years, says a new study published in Nature Medicine (November).

- 

The study analysed 296 adults aged 50-90 years, all of whom were mentally healthy at start. They were participants in a long-running Harvard Aging Brain Study. Brain scans were taken to measure two major protein buildups i