Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes
OBJECTIVE: The aim of this study was to evaluate the effect of organic grape juice intake on biochemical variables and microcirculatory parameters in triathlon athletes. INTRODUCTION: The physiological stress that is imposed by a strenuous sport, such as a triathlon, together with an insufficient am...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier España
2011-01-01
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| Series: | Clinics |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322011000900005 |
| _version_ | 1818859484917792768 |
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| author | Mariana Correa Gonçalves Flavia Fioruci Bezerra Elis Cristina de Araujo Eleutherio Eliete Bouskela Josely Koury |
| author_facet | Mariana Correa Gonçalves Flavia Fioruci Bezerra Elis Cristina de Araujo Eleutherio Eliete Bouskela Josely Koury |
| author_sort | Mariana Correa Gonçalves |
| collection | DOAJ |
| description | OBJECTIVE: The aim of this study was to evaluate the effect of organic grape juice intake on biochemical variables and microcirculatory parameters in triathlon athletes. INTRODUCTION: The physiological stress that is imposed by a strenuous sport, such as a triathlon, together with an insufficient amount of antioxidants in the diet may cause oxidative imbalance and endothelial dysfunction. METHODS: Ten adult male triathletes participated in this study. A venous blood sample was drawn before (baseline) and after 20 days of organic grape juice intake (300 ml/day). Serum insulin, plasma glucose and uric acid levels, the total content of polyphenols, and the erythrocyte superoxide dismutase activity were determined. The functional microcirculatory parameters (the functional capillary density, red blood cell velocity at baseline and peak levels, and time required to reach the peak red blood cell velocity during postocclusive reactive hyperemia after a one-min arterial occlusion) were evaluated using nailfold videocapillaroscopy. RESULTS: Compared with baseline levels, the peak levels of serum insulin ( p = 0.02), plasma uric acid ( p = 0.04), the functional capillary density ( p = 0.003), and the red blood cell velocity (p < 0.001) increased, whereas the plasma glucose level (p,0.001), erythrocyte superoxide dismutase activity ( p = 0.04), and time required to reach red blood cell velocity during postocclusive reactive hyperemia ( p = 0.04) decreased after organic grape juice intake. CONCLUSION: Our data showed that organic grape juice intake improved glucose homeostasis, antioxidant capacity, and microvascular function, which may be due to its high concentration of polyphenols. These results indicate that organic grape juice has a positive effect in endurance athletes. |
| first_indexed | 2024-12-19T09:12:55Z |
| format | Article |
| id | doaj.art-3e428f4152564868b8afae12dd043dee |
| institution | Directory Open Access Journal |
| issn | 1807-5932 1980-5322 |
| language | English |
| last_indexed | 2024-12-19T09:12:55Z |
| publishDate | 2011-01-01 |
| publisher | Elsevier España |
| record_format | Article |
| series | Clinics |
| spelling | doaj.art-3e428f4152564868b8afae12dd043dee2022-12-21T20:28:09ZengElsevier EspañaClinics1807-59321980-53222011-01-016691537154110.1590/S1807-59322011000900005Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletesMariana Correa GonçalvesFlavia Fioruci BezerraElis Cristina de Araujo EleutherioEliete BouskelaJosely KouryOBJECTIVE: The aim of this study was to evaluate the effect of organic grape juice intake on biochemical variables and microcirculatory parameters in triathlon athletes. INTRODUCTION: The physiological stress that is imposed by a strenuous sport, such as a triathlon, together with an insufficient amount of antioxidants in the diet may cause oxidative imbalance and endothelial dysfunction. METHODS: Ten adult male triathletes participated in this study. A venous blood sample was drawn before (baseline) and after 20 days of organic grape juice intake (300 ml/day). Serum insulin, plasma glucose and uric acid levels, the total content of polyphenols, and the erythrocyte superoxide dismutase activity were determined. The functional microcirculatory parameters (the functional capillary density, red blood cell velocity at baseline and peak levels, and time required to reach the peak red blood cell velocity during postocclusive reactive hyperemia after a one-min arterial occlusion) were evaluated using nailfold videocapillaroscopy. RESULTS: Compared with baseline levels, the peak levels of serum insulin ( p = 0.02), plasma uric acid ( p = 0.04), the functional capillary density ( p = 0.003), and the red blood cell velocity (p < 0.001) increased, whereas the plasma glucose level (p,0.001), erythrocyte superoxide dismutase activity ( p = 0.04), and time required to reach red blood cell velocity during postocclusive reactive hyperemia ( p = 0.04) decreased after organic grape juice intake. CONCLUSION: Our data showed that organic grape juice intake improved glucose homeostasis, antioxidant capacity, and microvascular function, which may be due to its high concentration of polyphenols. These results indicate that organic grape juice has a positive effect in endurance athletes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322011000900005Endurance athletesNailfold videocapillaroscopyGlucose homeostasisAntioxidant capacityMicrocirculatory function |
| spellingShingle | Mariana Correa Gonçalves Flavia Fioruci Bezerra Elis Cristina de Araujo Eleutherio Eliete Bouskela Josely Koury Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes Clinics Endurance athletes Nailfold videocapillaroscopy Glucose homeostasis Antioxidant capacity Microcirculatory function |
| title | Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes |
| title_full | Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes |
| title_fullStr | Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes |
| title_full_unstemmed | Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes |
| title_short | Organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes |
| title_sort | organic grape juice intake improves functional capillary density and postocclusive reactive hyperemia in triathletes |
| topic | Endurance athletes Nailfold videocapillaroscopy Glucose homeostasis Antioxidant capacity Microcirculatory function |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322011000900005 |
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