A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals
Background. Beetroot consumption has been proposed to improve exercise performance, since the nitrate content of this food is able to stimulate the synthesis of nitric oxide. Objective. The acute effect of 100 g of a beetroot gel containing ~10 mmol of nitrate was tested on the nitric oxide synthesi...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Journal of Nutrition and Metabolism |
| Online Access: | http://dx.doi.org/10.1155/2017/7853034 |
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| author | Julia Vasconcellos Diego Henrique Silvestre Diego dos Santos Baião João Pedro Werneck-de-Castro Thiago Silveira Alvares Vânia M. Flosi Paschoalin |
| author_facet | Julia Vasconcellos Diego Henrique Silvestre Diego dos Santos Baião João Pedro Werneck-de-Castro Thiago Silveira Alvares Vânia M. Flosi Paschoalin |
| author_sort | Julia Vasconcellos |
| collection | DOAJ |
| description | Background. Beetroot consumption has been proposed to improve exercise performance, since the nitrate content of this food is able to stimulate the synthesis of nitric oxide. Objective. The acute effect of 100 g of a beetroot gel containing ~10 mmol of nitrate was tested on the nitric oxide synthesis, on metabolic and biochemical parameters, and on performance in physically active individuals. Methods. Through a double blind, crossover, placebo-controlled study, 25 healthy runners ingested a single dose of beetroot and placebo gels. Participants performed an aerobic exercise protocol on a treadmill (3 min warm-up of 40% peak oxygen consumption, 4 min at 90% of gas exchange threshold I and 70% (Δ) maximal end speed until volitional fatigue). Results. Urinary levels of nitrite and nitrate increased after 90 min of beetroot gel ingestion. Plasma glucose concentrations lowered after the exercise and the decrease was maintained for 20 min. Systolic and diastolic blood pressures, serum cortisol, and blood lactate were not altered after the beetroot gel ingestion compared to a placebo gel. Conclusion. The single dose of beetroot gel provoked an increase of nitric oxide synthesis although no improvement on the physical performance of athletes during aerobic submaximal exercise was observed. |
| format | Article |
| id | doaj-art-1bc1aad8cd8543759628068a063987a0 |
| institution | Kabale University |
| issn | 2090-0724 2090-0732 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nutrition and Metabolism |
| spelling | doaj-art-1bc1aad8cd8543759628068a063987a02025-02-03T05:48:17ZengWileyJournal of Nutrition and Metabolism2090-07242090-07322017-01-01201710.1155/2017/78530347853034A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active IndividualsJulia Vasconcellos0Diego Henrique Silvestre1Diego dos Santos Baião2João Pedro Werneck-de-Castro3Thiago Silveira Alvares4Vânia M. Flosi Paschoalin5Instituto de Química, Universidade Federal do Rio de Janeiro, 21941-909 Rio de Janeiro, RJ, BrazilInstituto de Biofísica Carlos Chagas Filho e Escola de Educação Física e Esporte, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, RJ, BrazilInstituto de Química, Universidade Federal do Rio de Janeiro, 21941-909 Rio de Janeiro, RJ, BrazilInstituto de Biofísica Carlos Chagas Filho e Escola de Educação Física e Esporte, Universidade Federal do Rio de Janeiro, 21941-902 Rio de Janeiro, RJ, BrazilInstituto de Nutrição, Núcleo Básico de Nutrição e Dietética, Universidade Federal do Rio de Janeiro, 27979-000 Macaé, RJ, BrazilInstituto de Química, Universidade Federal do Rio de Janeiro, 21941-909 Rio de Janeiro, RJ, BrazilBackground. Beetroot consumption has been proposed to improve exercise performance, since the nitrate content of this food is able to stimulate the synthesis of nitric oxide. Objective. The acute effect of 100 g of a beetroot gel containing ~10 mmol of nitrate was tested on the nitric oxide synthesis, on metabolic and biochemical parameters, and on performance in physically active individuals. Methods. Through a double blind, crossover, placebo-controlled study, 25 healthy runners ingested a single dose of beetroot and placebo gels. Participants performed an aerobic exercise protocol on a treadmill (3 min warm-up of 40% peak oxygen consumption, 4 min at 90% of gas exchange threshold I and 70% (Δ) maximal end speed until volitional fatigue). Results. Urinary levels of nitrite and nitrate increased after 90 min of beetroot gel ingestion. Plasma glucose concentrations lowered after the exercise and the decrease was maintained for 20 min. Systolic and diastolic blood pressures, serum cortisol, and blood lactate were not altered after the beetroot gel ingestion compared to a placebo gel. Conclusion. The single dose of beetroot gel provoked an increase of nitric oxide synthesis although no improvement on the physical performance of athletes during aerobic submaximal exercise was observed.http://dx.doi.org/10.1155/2017/7853034 |
| spellingShingle | Julia Vasconcellos Diego Henrique Silvestre Diego dos Santos Baião João Pedro Werneck-de-Castro Thiago Silveira Alvares Vânia M. Flosi Paschoalin A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals Journal of Nutrition and Metabolism |
| title | A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals |
| title_full | A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals |
| title_fullStr | A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals |
| title_full_unstemmed | A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals |
| title_short | A Single Dose of Beetroot Gel Rich in Nitrate Does Not Improve Performance but Lowers Blood Glucose in Physically Active Individuals |
| title_sort | single dose of beetroot gel rich in nitrate does not improve performance but lowers blood glucose in physically active individuals |
| url | http://dx.doi.org/10.1155/2017/7853034 |
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