Whole Red Grape Juice Reduces Blood Pressure at Rest and Increases Post-exercise Hypotension. (3rd October 2017)

• Record Type: Journal Article
• Authors: Neto, Manoel Miranda; da Silva, Taís F.; de Lima, Fabiano F.; Siqueira, Thibério M. Q.; Toscano, Lydiane T.; de Moura, Stephanney K. M. S. F.; Silva, Alexandre S.
• Is Part Of: Journal of the American College of Nutrition. Volume 36:Number 7(2017)
• Page Start: 533
• Page End: 540
• Publication Date: 2017-10-03
• Subjects: Hypertension -- blood pressure -- post-exercise hypotension -- grape -- exercise; Nutrition -- Periodicals; Nutrition disorders -- Periodicals; 613.2
• DOI: 10.1080/07315724.2017.1331385
• Languages: English
• ISSNs: 0731-5724

Abstract

ABSTRACT: Objective : The objective of this study was to evaluate the effect of whole red grape juice (juice) on blood pressure (BP) at rest and on the magnitude of post-exercise hypotension (PEH). Methods : This double-blind, randomized controlled study was performed with 26 individuals with hypertension (40 to 59 years old) who were divided into experimental ( n = 14) and control ( n = 12) groups. Subsequently, the experimental group was subdivided according to the initial BP values. The subjects performed 2 sessions of aerobic exercise on a treadmill (60 minutes, 60%–85% maximum heart rate), separated by a 28-day period of supplementation with a daily dose of juice (150 ml for men and 100 ml for women) or a control drink. BP was measured before, during, and immediately after each exercise session as well as every 10 minutes during the 60-minute post-exercise recovery period. Results : The BP at rest did not change in the experimental group, but when this group was subdivided by initial BP, the subjects with controlled initial BP (EGCP) achieved a significant reduction (133.3 ± 5.6 to 114.6 ± 12.2 mmHg, p = 0.02); in contrast, the experimental group with borderline hypertensive BP values (EGBP) did not. Intervention with juice did not modify PEH in the experimental group, but when this group was divided as a function of the initial BP, PEH was potentiated at some times in EGCP. Conclusions : We conclude that juice promotes a reduction in BP at rest and is also capable of improving PEH in individuals with hypertension, but these effects are dependent on the initial BP values.