Acute Beetroot Juice Supplementation Does Not Attenuate Knee Extensor Exercise Muscle Fatigue in a Healthy Young Population
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Purpose: The effect of acute nitrate supplementation on muscle fatigue is largely unknown. This study aimed to evaluate the effect of acute nitrate supplementation on muscle fatigue.
Methods: Thirty-five recreationally active subjects consumed 140 ml of beetroot (BR) juice (nitrate: 8 mmol·d-1) or placebo (PL) 12 and 2.5 hours before two exercise sessions. Peak torque was measured during 50 repetitions, at maximal effort, and during concentric knee extensions at 90°·s-1. Blood pressure (BP) was recorded pre- and post-exercise.
Results: Peak torque, maximum work, rate of fatigue, and rate of work fatigue were similar between the BR and PL conditions. Post-exercise diastolic BP (BR: 67.2 ± 9.8 vs. PL: 64.5 ± 7.9 mmHg, p < 0.05) and mean arterial pressure (BR: 91.6 ± 9.3 vs. PL: 88.8 ± 8.2 mmHg, p < 0.05) were higher with BR supplementation.
Conclusion: These findings suggest that the acute intake of BR juice had no effect on knee extensor muscle strength or fatigue but increased BP in a healthy recreationally active population.
Delleli S, Ouergui I, Messaoudi H, Trabelsi K, Glenn J, Ammar A Nutrients. 2023; 15(2).
PMID: 36678270 PMC: 9860842. DOI: 10.3390/nu15020398.
Choi J, Lee Y, Lee S Front Nutr. 2022; 9:990418.
PMID: 36438753 PMC: 9682036. DOI: 10.3389/fnut.2022.990418.
Poredos D, Jenko Praznikar Z, Kozinc Z Nutrients. 2022; 14(22).
PMID: 36432445 PMC: 9692807. DOI: 10.3390/nu14224759.
Thurston T, Weavil J, Hureau T, Gifford J, Georgescu V, Wan H J Appl Physiol (1985). 2021; 131(6):1691-1700.
PMID: 34672767 PMC: 8714979. DOI: 10.1152/japplphysiol.00400.2021.
Ergogenic Effect of Nitrate Supplementation: A Systematic Review and Meta-analysis.
Senefeld J, Wiggins C, Regimbal R, Dominelli P, Baker S, Joyner M Med Sci Sports Exerc. 2020; 52(10):2250-2261.
PMID: 32936597 PMC: 7494956. DOI: 10.1249/MSS.0000000000002363.