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Physical activity links to lower dementia risk in hypertension

In an accelerometer cohort, the highest quartile of moderate activity showed a dementia hazard ratio of 0.41 compared with the lowest quartile.

Figure 1. The flow chart of participants through the study.The flow chart of participants through the study.Yang et al.

Frontiers in Aging Neuroscience4 Oct 2026, 08:10 BST

In a study of UK adults with hypertension, researchers analyzed associations between physical activity and incident dementia using UK Biobank data. The team examined 47,861 hypertensive participants who wore wrist accelerometers for seven days, alongside 226,156 participants who completed physical activity questionnaires.

Over a median follow-up of 8.1 years in the accelerometer cohort, 574 participants developed dementia. Compared with the lowest quartile, the highest quartiles of moderate activity (HR 0.41), vigorous activity (HR 0.34), and total activity (HR 0.63) showed lower dementia risks. In the questionnaire cohort, tracked over a median of 13.7 years, leisure-time exercise and housework also tied to lower dementia risks. Moderate activity showed a stronger relative risk reduction for early-onset than late-onset dementia.

Why it matters

Hypertension is a key vascular risk factor for neurodegeneration in older adults. These findings suggest that higher-intensity daily movement could help mitigate cognitive decline in high-risk cardiovascular populations.

Caveats

The observational design demonstrates associations rather than causal effects. Furthermore, the reliance on hospital inpatient and death records likely missed milder cases of dementia.