Walking helps keep the brain healthy, and a new study of more than 22,000 people shows exactly how many steps are needed to see the benefit. A year’s worth of fitness tracker data from the NIH All of Us Research Program suggests that getting about 8,000 steps a day is enough to protect the brain from dementia, Parkinson’s disease, and stroke. The findings were presented in San Diego at the Annual Meeting of the American Neurological Association.
Tracking activity over time
The research team followed 22,517 adults ages 40 and older for about five years. They used Fitbit data to group participants by their average daily steps. Rather than looking at a single snapshot, the study analyzed sustained activity patterns over an entire year. Electronic health records tracked new diagnoses of dementia, Parkinson’s, stroke, and transient ischemic attack.
The least-active group developed dementia, Parkinson’s, or stroke at an 80% higher rate than the most active group. There were 3.8 neurological diagnoses per 1,000 people in the low-activity group, compared with 2.7 in the moderate-activity group, and 2.1 in the high-activity group. The low-activity group also had a higher average BMI and higher rates of diabetes, high blood pressure, and depression.
A realistic daily goal
According to the study’s authors, people averaging around 8,000 steps a day had meaningfully lower rates of neurological disease than the least-active group. Researchers called this number “a realistic target” that aligns with federal guidance of about 150 minutes of moderate activity per week.
Lead author Meet Popatbhai Kachhadia, MD, a neurology resident at Florida Atlantic University, noted that low activity and conditions like obesity, diabetes, and depression often occur together. “Data from fitness trackers could help identify those who need earlier attention to their weight, blood sugar, blood pressure or mental health,” Kachhadia said. The study emphasizes that a low step count is a nudge to start moving more, not a diagnosis.
Consistency matters more than intensity, so a daily habit will likely serve the brain better than an occasional long walk. The benefits extend beyond the brain, as walking can help fight frailty and lower blood sugar. Simple changes, such as parking farther away or taking walking meetings, can make a big difference over time.