The effect of beetroot juice supplementation on dynamic apnea and intermittent sprint performance in elite female water polo playres
Journal article
Jonvik, Kristin L., van Dijk, Jan Willem, Senden, Joan M. G., van Loon, Luc J. C. and Verdijk, Lex B.. (2018). The effect of beetroot juice supplementation on dynamic apnea and intermittent sprint performance in elite female water polo playres. International Journal of Sport Nutrition and Exercise Metabolism. 28(5), pp. 468-473. https://doi.org/10.1123/ijsnem.2017-0293
Authors | Jonvik, Kristin L., van Dijk, Jan Willem, Senden, Joan M. G., van Loon, Luc J. C. and Verdijk, Lex B. |
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Abstract | Nitrate-rich beetroot juice is thought to have ergogenic effects, particularly in conditions where oxygen availability is limited. Whether these effects also apply to elite athletes is currently unknown. The aim of this study was to assess the effects of beetroot juice supplementation on dynamic apnea and intermittent sprint performance in elite female water polo players. In a doubleblinded, randomized, crossover manner, the Dutch National female water polo team (N = 14) was subjected to two 6-day supplementation periods (1 and 2), with either 140 ml/day of nitrate-rich (BR; ∼800 mg/day nitrate) or nitrate-depleted (PLA) beetroot juice. Following blood sampling on Day 6, the athletes performed amaximal-distance front crawl swimming test without breathing (dynamic apnea test). In addition, intermittent sprint performance was assessed by performing 16 swim sprints of 15 m, in a 4 × 4 block with 30-s recovery between blocks (intermittent test). Distance covered during the dynamic apnea test did not differ between BR (49.5 ± 7.8 m) and PLA (46.9 ± 9.1 m, p = .178). However, when correcting for test order, the distance covered was significantly larger in BR versus PLA when BR was ingested in Period 2 (50.1 ± 8.5 vs. 42.8 ± 5.7 m, p = .002), whereas no difference was observed when BR was ingested in Period 1 (48.8 ± 7.4 vs. 52.3 ± 10.4 m, p = .10). The time to complete the intermittent test was not different between BR and PLA (316.0 ± 7.9 vs. 316.3 ± 6.9 s, p = .73). In conclusion, beetroot juice supplementation does not improve intermittent performance in elite female water polo players, but there may be a potential for ergogenic effects during dynamic apnea. |
Keywords | ergogenic; nitrate; nitrite |
Year | 2018 |
Journal | International Journal of Sport Nutrition and Exercise Metabolism |
Journal citation | 28 (5), pp. 468-473 |
Publisher | Human Kinetics Publishers |
ISSN | 1526-484X |
Digital Object Identifier (DOI) | https://doi.org/10.1123/ijsnem.2017-0293 |
Scopus EID | 2-s2.0-85054456600 |
Open access | Published as green open access |
Page range | 468-473 |
Funder | Dutch Technology Foundation |
Research Group | Mary MacKillop Institute for Health Research |
Author's accepted manuscript | License All rights reserved File Access Level Open |
Publisher's version | License All rights reserved File Access Level Controlled |
Output status | Published |
Publication dates | |
Online | 2018 |
Grant ID | 12877 |
https://acuresearchbank.acu.edu.au/item/8v843/the-effect-of-beetroot-juice-supplementation-on-dynamic-apnea-and-intermittent-sprint-performance-in-elite-female-water-polo-playres
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File access level: Open |
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