Drinking beetroot juice for a short time or for a week might help improve blood flow in the arteries of postmenopausal women with high blood pressure, especially after they exercise, which could mean their blood vessels are working better.

This study would enroll postmenopausal women with systemic arterial hypertension, randomly assign them to consume either beetroot juice (400–800 mg NO3-) or a placebo (nitrate-free juice) in two separate 7-day periods with a washout phase, measure FMD acutely after the first dose and again after one week of daily ingestion during standardized post-exercise recovery, and compare changes in FMD between conditions.

This study would randomize postmenopausal women with systemic arterial hypertension into two groups: one receiving daily beetroot juice (400–800 mg NO3-) for one week, the other receiving placebo juice, with FMD measured acutely after the first dose and again after 7 days of daily intake during standardized post-exercise recovery to compare group differences in FMD change.

This study would give postmenopausal women with systemic arterial hypertension daily beetroot juice (400–800 mg NO3-) for one week and measure FMD acutely after the first dose and again after 7 days during standardized post-exercise recovery to assess within-subject changes.

This study would follow postmenopausal women with systemic arterial hypertension who self-select to consume beetroot juice (400–800 mg NO3-) daily for one week, measuring FMD acutely after first intake and after 7 days during standardized post-exercise recovery to observe naturalistic trends.

This study would enroll a small group of postmenopausal women with systemic arterial hypertension who consume beetroot juice (400–800 mg NO3-) for one week and measure FMD acutely and after 7 days during post-exercise recovery to explore feasibility and preliminary trends.