November 19, 2020
While physical activity has been shown to decrease the risk of hypertension, the impacts of walking on hypertension risk is unclear. Furthermore, studies in older women are sparse despite high levels of hypertension and the popularity of walking as a form of exercise in this population. For his Epidemiology Master of Science thesis, Mr. Connor Miller examined whether walking volume (characterized by frequency, duration, and intensity) and speed was associated with incident hypertension among over 83,000 WHI women followed an average of 11 years. Information about walking and hypertension was collected by survey. Women were placed into 1 of 4 groups based on levels of walking volume (0, >0-3.5, 3.6-7.5, and >7.5 metabolic equivalent hours per week) and speed (<2, 2-3, 3-4, >4 miles per hour). Their analysis found that as walking volume and speed increased, the risk of hypertension decreased. Specifically, the risk of hypertension relative to non-walkers was 0.89 lower in women with the highest walking volume and 0.79 lower among the fastest walkers, even after accounting for covariates such as smoking, diet, and other chronic conditions. The authors concluded that walking should be encouraged as a hypertension prevention strategy in older women.
The WHI program is funded by the National Heart, Lung, and Blood Institute, National Institutes of Health, U.S. Department of Health and Human Services.
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