A new study from researchers at the University of California suggests that high-intensity interval training may help preserve brain function in older adults. In a 12-week program, participants ages 65 to 80 showed gains in memory and executive-function test scores, pointing to exercise as a possible tool against age-related cognitive decline.

The findings add to a growing body of evidence that physical activity benefits not only the body but also the brain. HIIT, which alternates short bursts of hard effort with brief recovery periods, is often seen as a time-efficient form of exercise that may be easier to adopt than longer workouts.

Researchers said the improvement in scores was meaningful enough to highlight HIIT as a low-cost intervention worth further study. Still, they cautioned that larger trials will be needed to confirm how well the results hold up across different populations and fitness levels.

For aging adults looking for ways to stay active, the study offers a practical message: even a short, structured exercise routine may support both physical health and cognitive sharpness.