Two modifiable habits at midlife — staying physically active and keeping blood sugar under control — may help protect the brain decades later, according to new research.
Scientists at UT Health San Antonio followed 402 participants and found that higher physical activity and better-controlled blood sugar in midlife were associated with slower cognitive decline years afterward. The findings were published in the journal Alzheimer’s & Dementia.
Association, not proof
This is an observational study, so it can show links but cannot prove that exercise or blood-sugar control directly cause better brain aging. People who exercise and manage their metabolic health also tend to differ in other ways that can influence cognition. Still, the results add to a large and consistent body of evidence tying cardiovascular and metabolic health to brain health.
Why it matters
Both physical activity and blood-sugar control are things people can act on, and midlife may be an especially important window. The researchers frame the findings as further support for treating heart-and-metabolism health as brain health — without promising that any single habit prevents dementia.
This article summarizes observational research and is not medical advice.