Midlife Exercise Slows Mexican American Cognitive Decline
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- UT Health San Antonio researchers tracked 402 San Antonio adults (mean age 57.9; 52% Hispanic; 58.5% women) and found that midlife cardiovascular health, measured via the American Heart Association's Life's Simple 7, was linked to significantly slower cognitive decline decades later.
- Physical activity emerged as the strongest protective factor for Mexican American participants, while fasting blood glucose at or below 126 mg/dL drove the cognitive benefit for non-Hispanic white participants, suggesting the same prevention playbook doesn't fit all groups.
- The analysis, published July 23 in the journal Alzheimer's & Dementia, found cognitive decline differed by ethnicity even within the same San Antonio source population and shared geographic context, according to first author Janette Vazquez, PhD.
- Hispanic adults aged 65 and older carry a disproportionate Alzheimer's burden — about 14% have the disease, compared with 10% of non-Hispanic white older adults, and Mexican Americans also have notably higher rates of diabetes, obesity, and dyslipidemia, the study notes.
- Co-senior authors Claudia Satizabal, who leads the Population Neuroscience Core at UT Health's Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, and Chen-Pin Wang drew participants from the decades-long San Antonio Heart Study and San Antonio Longitudinal Study of Aging.
- The researchers note that nearly 40% of Alzheimer's cases may be tied to modifiable risk factors and that 6.7 million people in the US currently live with the disease, making midlife prevention targets increasingly urgent.
Why it matters: Mexican Americans carry roughly a 40% higher Alzheimer's prevalence than non-Hispanic whites (14% vs 10% among those 65+) yet remain underrepresented in aging research, so a one-size-fits-all prevention message — "just exercise" — may underserve the highest-risk group. This study suggests cardiovascular priorities should be tuned to ethnicity: movement matters most for Mexican Americans, glycemic control for non-Hispanic whites. That nuance could reshape screening and lifestyle guidance in South Texas clinics serving both populations side by side.
Ask SkimNews
