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Effects of watermelon supplementation on arterial stiffness and wave reflection amplitude in postmenopausal women.
MedLine Citation:
PMID:  23149868     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: Postmenopausal women have increased arterial stiffness (brachial-ankle pulse wave velocity [baPWV]) and wave reflection. L-Citrulline supplementation reduces baPWV but not brachial blood pressure. Peripheral vasodilators decrease wave reflection amplitude or second systolic peak (SBP2) in radial artery and aorta, which are related to aortic systolic blood pressure (SBP). We examined the effects of L-citrulline-rich watermelon supplementation on baPWV, wave reflection characteristics, and aortic SBP in postmenopausal women. METHODS: In a randomized cross-over study, 12 postmenopausal women (mean [SE] age, 57 [1] y; mean [SE] body mass index, 38.1 [2.1] kg/m; mean [SE] SBP, 153 [4] mm Hg) were assigned to watermelon supplementation (L-citrulline/L-arginine 6 g/d) or placebo supplementation for 6 weeks. Before and after each intervention, baPWV, aortic SBP, aortic diastolic blood pressure, aortic SBP2, radial SBP2, and aortic and radial augmentation indices were measured using applanation tonometry. RESULTS: baPWV (-1.2 [0.3] m/s, P < 0.001), aortic SBP (-10 [3] mm Hg, P < 0.01), and aortic diastolic blood pressure (-7 [1] mm Hg, P < 0.001) decreased after watermelon supplementation compared with placebo. Although radial and aortic augmentation indices were unaffected, radial and aortic SBP2 decreased (-10 [3] mm Hg, P < 0.01) after watermelon supplementation compared with placebo. The reduction in aortic SBP was correlated with reductions in radial SBP2 (r = 0.99, P < 0.001) and aortic SBP2 (r = 0.98, P < 0.001). The decreases in baPWV correlated with reductions in radial SBP2 (r = 0.57, P < 0.01) and aortic SBP2 (r = 0.64, P < 0.01). CONCLUSIONS: Watermelon supplementation reduces arterial stiffness and aortic SBP by reducing pressure wave reflection amplitude in obese postmenopausal women with hypertension.
Authors:
Arturo Figueroa; Alexei Wong; Shirin Hooshmand; Marcos Angel Sanchez-Gonzalez
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-12
Journal Detail:
Title:  Menopause (New York, N.Y.)     Volume:  -     ISSN:  1530-0374     ISO Abbreviation:  Menopause     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9433353     Medline TA:  Menopause     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
From the Department of Nutrition, Food, and Exercise Sciences, The Florida State University, Tallahassee, FL.
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