Effects of Beetroot Juice Supplementation on Performance and Fatigue in a 30-s All-Out Sprint Exercise: A Randomized, Double-Blind Cross-Over Study
by
Eduardo Cuenca 1, Pablo Jodra 2,3, Alberto Pérez-López 4
, Liliana G. González-Rodríguez 2,5, Sandro Fernandes da Silva 6, Pablo Veiga-Herreros 2 and Raúl Domínguez 7,*
Eduardo Cuenca 1, Pablo Jodra 2,3, Alberto Pérez-López 4, Liliana G. González-Rodríguez 2,5, Sandro Fernandes da Silva 6, Pablo Veiga-Herreros 2 and Raúl Domínguez 7,*
1
GRI-AFIRS, Escuela de Ciencias de la Salud, TecnoCampus-Universidad Pompeu Fabra, Mataró, 08005 Barcelona, Spain
2
Faculty of Health Sciences, University Alfonso X El Sabio, 28691 Madrid, Spain
3
Department of Education Sciences, University of Alcalá, 28805 Alcalá de Henares, Spain
4
Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, 28805 Alcalá de Henares, Spain
5
Investigation Group Valornut, Department of Nutrition, Faculty of Pharmacy, University Complutense de Madrid, 28691 Madrid, Spain
6
Studies Research Group in Neuromuscular Responses (GEPE N), University of Lavras, 37200-000 Lavras, Brazil
7
Faculty of Health Sciences, University Isabel I, 09004 Burgos, Spain
*
Author to whom correspondence should be addressed.
Nutrients 2018, 10(9), 1222; https://doi.org/10.3390/nu10091222
Received: 3 August 2018 / Revised: 30 August 2018 / Accepted: 31 August 2018 / Published: 4 September 2018
As a nitric oxide precursor, beetroot juice (BJ) is known to enhance high-intensity exercise performance (80–100% VO2max) yet its impacts on higher intensity sprint exercise (>100% VO2max) remain to be established. This study sought to examine the effects of BJ supplementation on performance and subsequent fatigue during an all-out sprint exercise. Using a randomized cross-over, double-blind, placebo-controlled design, 15 healthy resistance-trained men (22.4 ± 1.6 years) ingested 70 mL of either BJ or placebo. Three hours later, participants undertook a 30-s all-out Wingate test. Before and after the sprint exercise and at 30 s and 180 s post-exercise, three countermovement jumps (CMJ) were performed and blood lactate samples were obtained. Compared to placebo, BJ consumption improved peak (placebo vs. BJ, 848 ± 134 vs. 881 ± 135 W; p = 0.049) and mean (641 ± 91 vs. 666 ± 100 W; p = 0.023) power output and also reduced the time taken to reach Wpeak in the Wingate test (8.9 ± 1.4 vs. 7.3 ± 0.9 s; p = 0.003). No differences were detected in the fatigue index. In addition, while over time CMJ height and power diminished (ANOVA p < 0.001) and blood lactate levels increased (ANOVA p < 0.001), no supplementation effect was observed. Our findings indicate that while BJ supplementation improved performance at the 30-s cycling sprint, this improvement was not accompanied by differences in fatigue during or after this type of exercise.
View Full-Text
Keywords:
nitric oxide; nitrates; muscle power; muscle fatigue
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Cuenca, E.; Jodra, P.; Pérez-López, A.; González-Rodríguez, L.G.; Fernandes da Silva, S.; Veiga-Herreros, P.; Domínguez, R. Effects of Beetroot Juice Supplementation on Performance and Fatigue in a 30-s All-Out Sprint Exercise: A Randomized, Double-Blind Cross-Over Study. Nutrients 2018, 10, 1222.
Show more citation formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
