A Single Dose of Beetroot Juice Does Not Change Blood Pressure Response Mediated by Acute Aerobic Exercise in Hypertensive Postmenopausal Women

Abstract

Objective: To verify if acute intake of beetroot juice potentiates post-exercise hypotension (PEH) in hypertensive postmenopausal women. Methods: Thirteen hypertensive postmenopausal women (58.1 ± 4.62 years and 27.4 ± 4.25 kg/m²) were recruited to participate in three experimental sessions, taking three different beverages: Beetroot juice (BJ), placebo nitrate-depleted BJ (PLA), and orange flavored non-caloric drink (OFD). The participants performed moderate aerobic exercise training on a treadmill, at 65–70% of heart rate reserve (HRR), for 40 min. After an overnight fast, the protocol started at 07h when the first resting blood pressure (BP) was measured. The beverage was ingested at 07h30 and BP was monitored until the exercise training started, at 09h30. After the end of the exercise session, BP was measured every 15 min over a 90-min period. Saliva samples were collected at rest, immediately before and after exercise, and 90 min after exercise for nitrite (NO2−) analysis. Results: There was an increase in salivary NO2− with BJ intake when compared to OFD and PLA. A slight increase in salivary NO2− was observed with PLA when compared to OFD (p < 0.05), however, PLA resulted in lower salivary NO2− when compared to BJ (p < 0.001). There were no changes in salivary NO2− with the OFD. Systolic and diastolic BP decreased (p < 0.001) on all post exercise time points after all interventions, with no difference between the three beverages. Conclusion: Acute BJ intake does not change PEH responses in hypertensive postmenopausal women, even though there is an increase in salivary NO2−.

Beetroot juice intake with different amounts of nitrate does not change aerobic exercise-mediated responses in heart rate variability in hypertensive postmenopausal women: A randomized, crossover and double-blind study

“…In the present study, the authors have used the secondary outcome(s) of previous study published by Amaral et al., 24 that investigated the BP responses using the same methods. It was a crossover, randomized and double-blind study that consisted of four visits to the laboratory.…”

“…The characteristics of the participants were the same described by Amaral et al. 24 They were postmenopausal hypertensive women aged 50–70 years who were physically active and had HT controlled by medication use. All the volunteers presented stage 1 hypertension ,according with Brazilian Cardiology Society 25 , that considers hypertension stage 1 the patients with baseline blood pressure values greater or equal to 140 mmHg for systolic blood pressure (SBP) and 90 mmHg for diastolic blood pressure (DBP), and not higher than 160 mmHg for SBP and 100 mmHg for DBP.…”

Comparison of Physical Effect Between Two Training Methods for Individuals With Substance Use Disorder

“…The relaxation form of exercise may reduce the tension of vascular center and vascular smooth muscle, and accelerate blood ow leading to the reduction of blood pressure. The practice of regular physical exercise can reduce resting blood pressure chronically, as a result, it induce post-exercise hypotension, which is a reduction in blood pressure below resting values after exercise training (31). Therefore, HIIT and MICT have a similar effect to reduce blood pressure.…”

The Importance of Nutrition in Hypertension

“…Five articles [1,2,3,4,5] and one review [6] explain the possible blood pressure (BP) lowering effects of different nutritional elements.…”

“…On the other hand, beetroot juice intake should be carefully considered; even if it increases the nitric oxide (NO) salivary concentration in post-menopausal women, it does not show significant effects on BP control. In a study on 13 hypertensive post-menopausal women [1] undergoing beetroot juice administration and moderate-intensive aerobic exercise, no significant BP reduction was observed. The possible effects of high intake of fish are analysed in Vildmyren’s study [5]; a press-cake meal (water-insoluble proteins obtained from cod residual materials), given to obese Zucker fa/fa rats, was found to prevent or delay high blood pressure through inhibition of renin-angiotensin-system (RAAS).…”