\t\t\t<\/p>\n \t\t\t\t\t\t <\/p>\n \tRelated story \t\t\t\t\t<\/p>\n \t\t\t\t\t10 Best Protein Shakes for Women, According to Editors and Experts\t\t<\/p>\n <\/span><\/p><\/div>\n \t\t<\/a><\/p>\n<\/article>\n \t \n\tThe paper, \u201cPhysical activity as a modifiable risk factor in preclinical Alzheimer\u2019s disease,\u201d was published November 3, 2025, in Nature Medicine<\/em><\/a>. Researchers followed 296 Harvard Aging Brain Study participants ages 50 to 90 who had no memory or thinking impairment at enrollment.<\/p>\n \n\tParticipants wore pedometers for a week and completed annual assessments of their thinking and everyday functioning for up to 14 years. PET brain scans, repeated in some participants, tracked amyloid-beta and tau \u2014 two proteins that build up in Alzheimer\u2019s disease.<\/p>\n \n\tAmong people with elevated amyloid, those taking 3,001\u20135,000 daily steps showed slower tau buildup and slower cognitive decline than inactive participants. Higher activity was also linked to slower declines in everyday functioning. In the moderate and highest activity groups, researchers estimated roughly half as much cognitive decline over nine years as in inactive participants.<\/p>\n \n\tThe team included senior author Dr. Jasmeer Chhatwal, a Mass General Brigham neurologist, and lead author Dr. Wai-Ying Wendy Yau, a cognitive neurologist.<\/p>\n \n\tYou don\u2019t have to make 10,000 steps your starting goal. The Harvard findings were encouraging at much lower activity levels, though 3,000 isn\u2019t a magic number. The first category above \u201cinactive\u201d covered 3,001\u20135,000 daily steps.<\/p>\n \n\t\u201c3,000 steps is not a proven \u2018minimum dose\u2019 for preventing tau accumulation,\u201d Dr. Jay Luthar<\/a>, a Harvard Medical School instructor and founder of Lutanen Health, tells SheKnows<\/em>.<\/p>\n \n\tFor context, researchers used about 2,800 and 8,700 daily steps to represent lower and higher activity levels in their models. Around 3,000 steps is roughly half an hour of moderate-paced walking.<\/p>\n \n\tHogervorst also highlights a larger 2022 UK study<\/a> that followed 78,430 people for seven years using wrist-worn activity trackers. Around 3,800 daily steps were associated with 25% lower dementia risk, rising to about 50% at 9,800 steps.<\/p>\n \n\t\u201cLifestyle changes may slow the emergence of cognitive symptoms if we act early,\u201d senior author Dr. Jasmeer Chhatwal, a Mass General Brigham neurologist, said in the study release<\/a>.<\/p>\n \n\tYou may not need to keep chasing a higher number. The association leveled off at 5,001\u20137,500 daily steps. For people with elevated amyloid, the researchers\u2019 estimates suggested:<\/p>\n \n\tThese were estimates from the researchers\u2019 models, not guaranteed extra years without symptoms. People who took fewer steps also had faster declines in memory, thinking, and everyday functioning. Among those who walked more, the slower tau buildup helped explain why their thinking skills held up better.<\/p>\n \n\t\u201cWe were able to clarify that the association with cognitive decline was not explained by differences in amyloid accumulation,\u201d first author Dr. Wai-Ying Wendy Yau, a cognitive neurologist, told Newsweek<\/em><\/a>. The distinction is that activity was linked to slower tau buildup, not reduced amyloid accumulation.<\/p>\n \n\tThe study was relatively small, participants were mostly white and highly educated, and researchers couldn\u2019t account for every health or lifestyle difference. Early Alzheimer\u2019s changes may also make people less active, so the relationship could partly work in the other direction.<\/p>\n \n\tStart by seeing where you are now. Use your phone or a pedometer to track your usual steps for a few days. If you spend much of the day sitting, work gradually toward around 3,000 daily steps, with 5,000\u20137,500 as a possible longer-term goal. You don\u2019t have to get them all in one walk \u2014 the study measured total daily steps.<\/p>\n \n\tLuthar suggests five minutes after breakfast and another five after lunch, then building from there. \u201cConsistency over months and years is more valuable than an ambitious target that someone abandons after a week,\u201d he tells SheKnows<\/em>.<\/p>\n \n\tWhen you can, take your walk outside or invite someone to join you. Hogervorst notes that daylight and social connection may also benefit sleep, mood, and brain health<\/a>, and there are plenty more ways to reduce your risk for Alzheimer\u2019s and dementia \u2014 start here<\/a>.<\/p>\n \n\tThe encouraging takeaway is that a little walking may go a long way. Around 3,000 daily steps (roughly half an hour at a moderate pace) showed promise, and the strongest association leveled off at 5,001\u20137,500. A half-hour walk could be a manageable starting point \u2014 and those steps don\u2019t all have to happen at once.<\/p>\n<\/p><\/div>\n![\"10](\"https:\/\/www.sheknows.com\/wp-content\/themes\/vip\/pmc-sheknows-2020\/assets\/public\/lazyload-fallback.gif\")
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\n<\/section>\n<\/p>\n\n\t\tWhat Did the Harvard Study Find?\t<\/h2>\n
\n\t\tWhy Does 3,000 Steps Matter?\t<\/h2>\n
\n\t\tWhere Was the Step-Count Sweet Spot?\t<\/h2>\n
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\n\t\tHow Can You Make More Steps Doable?\t<\/h2>\n