Academic Journal
Effects of acute beetroot juice intake on performance, maximal oxygen uptake, and ventilatory efficiency in well-trained master rowers: a randomized, double-blinded crossover study
| العنوان: | Effects of acute beetroot juice intake on performance, maximal oxygen uptake, and ventilatory efficiency in well-trained master rowers: a randomized, double-blinded crossover study |
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| المؤلفون: | Manuel V. Garnacho-Castaño, Eulogio Pleguezuelos-Cobo, Marina Berbel, Alfredo Irurtia, Marta Carrasco-Marginet, Jorge Castizo-Olier, Pablo Veiga-Herreros, Marcos Faundez-Zanuy, Noemí Serra-Payá |
| المصدر: | Journal of the International Society of Sports Nutrition, Vol 21, Iss 1 (2024) |
| بيانات النشر: | Taylor & Francis Group, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Nutrition. Foods and food supply LCC:Sports medicine |
| مصطلحات موضوعية: | Nitrate supplementation, rowing ergometer, cardiorespiratory performance, nitric oxide, lactate, time trial performance, Nutrition. Foods and food supply, TX341-641, Sports medicine, RC1200-1245 |
| الوصف: | Background Beetroot juice (BRJ) intake has been considered a practical nutritional strategy among well-trained athletes. This study aimed to assess the effects of BRJ intake on performance, cardiorespiratory and metabolic variables during a simulated 2000-meter rowing ergometer test in well-trained master rowers.Method Ten well-trained male master rowers (30–48 years) participated in a randomized, double-blind, crossover design for 3 weeks. In the first week, a researcher explained all the experimental procedures to the participants. In the next two weeks, the participants were tested in 2 rowing ergometer sessions, separated from each other by a 7-day washout period. In both strictly identical sessions, the participants randomly drank BRJ or placebo (PL) 3 hours before the start of the tests. Subsequently, the participants carried out the 2000-meter rowing ergometer tests. Oxygen saturation and blood lactate measurements were performed before starting (pretest) and at the end of the test (posttest). Performance parameters and cardiorespiratory variables were recorded during the rowing ergometer test.Results An improvement in time trial performance was observed, with a mean difference of 4 seconds (90% confidence limits ± 3.10; p ≤ 0.05) compared to PL. Relative and absolute [Formula: see text] increased (mean difference of 2.10 mL·kg−1·min−1, 90% confidence limits ± 1.80; mean difference of 0.16 L·min−1 90% confidence limits ± 0.11, respectively; p ≤ 0.05) compared to PL. No ergogenic effect was observed on ventilatory efficiency and blood lactate concentrations after BRJ intake.Conclusion Acute BRJ intake may improve time trial performance as well as [Formula: see text] in well-trained master rowers. However, BRJ does not appear to improve ventilatory efficiency. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 15502783 1550-2783 |
| Relation: | https://doaj.org/toc/1550-2783 |
| DOI: | 10.1080/15502783.2024.2373170 |
| URL الوصول: | https://doaj.org/article/b402c41ccdd148118f671005e098ea65 |
| رقم الانضمام: | edsdoj.b402c41ccdd148118f671005e098ea65 |
| قاعدة البيانات: | Directory of Open Access Journals |
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