Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters

Dumar, Amanda M.; Huntington, Anna F.; Rogers, Rebecca R.; Kopec, Thomas J.; Williams, Tyler D.; Ballmann, Christopher G.

doi:10.3390/ijerph18020412

Open AccessFeature PaperArticle

Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters

by

Amanda M. Dumar

^†,

Anna F. Huntington

^†,

Rebecca R. Rogers

,

Thomas J. Kopec

,

Tyler D. Williams

and

Christopher G. Ballmann

^*

Department of Kinesiology, Samford University, 800 Lakeshore Dr., Birmingham, AL 35229, USA

^*

Author to whom correspondence should be addressed.

^†

Indicates authors contributed equally.

Int. J. Environ. Res. Public Health 2021, 18(2), 412; https://doi.org/10.3390/ijerph18020412

Submission received: 5 December 2020 / Revised: 5 January 2021 / Accepted: 6 January 2021 / Published: 7 January 2021

(This article belongs to the Special Issue Exercise and Sport in Stressful Conditions and Environments)

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Abstract

Diurnal fluctuations in power output have been well established with power loss typically occurring in morning (AM) times. Beetroot juice (BRJ) is a source of dietary nitrate that possess ergogenic properties, but it is unknown if ingestion can mitigate performance decrements in the morning. The purpose of this study was to examine the effects of acute BRJ supplementation on diurnal fluctuations in anaerobic performance in trained sprinters. Male Division 1 National Collegiate Athletic Association (NCAA) sprinters (n = 10) participated. In a double-blinded crossover study design, participants completed three counterbalanced exercise trials under different conditions: Morning–placebo (8:00 HR, AM-PL), Morning–BRJ (8:00 HR, AM-BRJ), and Afternoon–no supplement (15:00 HR, PM). For each trial, participants completed 3 × 15 s Wingate anaerobic tests separated by 2 min of rest. Each trial was separated by a 72 h washout period. Mean power output (p = 0.043), anaerobic capacity (p = 0.023), and total work (p = 0.026) were significantly lower with the AM-PL condition compared to PM. However, BRJ supplementation prevented AM losses of mean power output (p = 0.994), anaerobic capacity (p = 0.941), and total work (p = 0.933) in the AM-BRJ compared to the PM condition. Rate of perceived exertion was not significantly different between any conditions (p = 0.516). Heart rate was significantly lower during the AM-BRJ condition compared to AM-PL (p = 0.030) and PM (p < 0.001). Findings suggest anaerobic capacity suffers during AM versus PM times in trained sprinters, but BRJ ingestion abolishes AM-associated decrements in performance.

Keywords: nitrite; wingate; sprint; anaerobic capacity

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MDPI and ACS Style

Dumar, A.M.; Huntington, A.F.; Rogers, R.R.; Kopec, T.J.; Williams, T.D.; Ballmann, C.G. Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters. Int. J. Environ. Res. Public Health 2021, 18, 412. https://doi.org/10.3390/ijerph18020412

AMA Style

Dumar AM, Huntington AF, Rogers RR, Kopec TJ, Williams TD, Ballmann CG. Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters. International Journal of Environmental Research and Public Health. 2021; 18(2):412. https://doi.org/10.3390/ijerph18020412

Chicago/Turabian Style

Dumar, Amanda M., Anna F. Huntington, Rebecca R. Rogers, Thomas J. Kopec, Tyler D. Williams, and Christopher G. Ballmann. 2021. "Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters" International Journal of Environmental Research and Public Health 18, no. 2: 412. https://doi.org/10.3390/ijerph18020412

APA Style

Dumar, A. M., Huntington, A. F., Rogers, R. R., Kopec, T. J., Williams, T. D., & Ballmann, C. G. (2021). Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters. International Journal of Environmental Research and Public Health, 18(2), 412. https://doi.org/10.3390/ijerph18020412

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Acute Beetroot Juice Supplementation Attenuates Morning-Associated Decrements in Supramaximal Exercise Performance in Trained Sprinters

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