Any physical activity in midlife, compared with none, was linked to slower cognitive decline later in life among Mexican American adults in a San Antonio study of 402 people.[1] It is an observational finding, so it can’t prove that movement caused the slower decline. It does fit a simple takeaway: you don’t have to wait for a perfect routine to start.
What the researchers did
The team used data from two long-running San Antonio studies. They scored each person’s midlife cardiovascular health with the American Heart Association’s Life’s Simple 7, which covers diet, smoking, physical activity, blood pressure, body mass index, total cholesterol and fasting blood glucose. Later, thinking skills were measured up to four times with the Mini-Mental State Examination, an 11-question screening test.[1]
The 402 participants had an average age of 57.9 at the start. About 52% were Hispanic, the rest were non-Hispanic white, and 58.5% were women. The models accounted for age, sex, income and education.[1]
What they found
- Among Mexican American participants, being active at all, rather than sedentary, was linked to slower cognitive decline.[1]
- Among non-Hispanic white participants, a fasting blood glucose of 126 mg/dL or lower was linked to slower decline.[1]
- The two groups showed different patterns, and the authors say larger samples are needed to confirm the differences.[1]
What this study does not show
The study links midlife habits to later test scores. It does not show that adding exercise slows decline, and the Mini-Mental State Examination is a screening test, not a detailed measure of memory. With 402 people split into two groups, the ethnic differences are early signals, not settled facts.[1]
What to do with this
- Count the movement you already do. In this study the comparison was any activity versus none, so a daily walk is a real starting point.
- Ask your clinician when your last fasting glucose was checked, and what your number means for you.
- Pick one habit you can repeat this week, such as a 20-minute walk after lunch, and keep it for a month before adding anything.
References
[1] Vazquez J, Bernal R, Aguirre LA, Melgarejo JD, et al. Longitudinal association between midlife cardiovascular health and cognitive change in a bi-ethnic cohort. Alzheimer’s & Dementia: Behavior & Socioeconomics of Aging, 2026;2(3):e70096. Population: 402 adults from the San Antonio Heart Study and the San Antonio Longitudinal Study of Aging; mean age 57.9 years. DOI: https://doi.org/10.1002/bsa3.70096. Finding as used: physical activity was associated with slower cognitive decline among Mexican American participants, and fasting glucose of 126 mg/dL or lower with slower decline among non-Hispanic white participants; results differed by ethnicity and need replication in larger samples. ↑︎
Kurt Greiner
Kurt is a digital strategist and IT professional blending emerging technology with practical application, exploring how individuals can leverage modern tools to navigate the second half of life with purpose.
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