The Effects of Acute and Chronic Beetroot Juice Supplementation on Exercise Economy and Time Trial Performance in Recreationally Active Females

Six days of dietary nitrate supplementation in the form of beetroot juice (~0.5 L/d) has been reported to reduce pulmonary oxygen uptake (VO2) during submaximal exercise and increase tolerance of high-intensity work rates, suggesting that nitrate can be a potent ergogenic aid. Limited data are available regarding the effect of nitrate ingestion on athletic performance, and no study has investigated the potential ergogenic effects of a small-volume, concentrated dose of beetroot juice. The authors tested the hypothesis that 6 d of nitrate ingestion would improve time-trial performance in trained cyclists. Using a double-blind, repeated-measures crossover design, 12 male cyclists (31 ± 3 yr, VO2peak = 58 ± 2 ml · kg−1 · min−1, maximal power [Wmax] = 342 ± 10 W) ingested 140 ml/d of concentrated beetroot (~8 mmol/d nitrate) juice (BEET) or a placebo (nitrate-depleted beetroot juice; PLAC) for 6 d, separated by a 14-d washout. After supplementation on Day 6, subjects performed 60 min of submaximal cycling (2 × 30 min at 45% and 65% Wmax, respectively), followed by a 10-km time trial. Time-trial performance (953 ± 18 vs. 965 ± 18 s, p < .005) and power output (294 ± 12 vs. 288 ± 12 W, p < .05) improved after BEET compared with PLAC supplementation. Submaximal VO2 was lower after BEET (45% Wmax = 1.92 ± 0.06 vs. 2.02 ± 0.09 L/min, 65% Wmax 2.94 ± 0.12 vs. 3.11 ± 0.12 L/min) than with PLAC (main effect, p < .05). Wholebody fuel selection and plasma lactate, glucose, and insulin concentrations did not differ between treatments. Six days of nitrate supplementation reduced VO2 during submaximal exercise and improved time-trial performance in trained cyclists.

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Effects of Beetroot Juice Supplementation and Hypoxia on Time Trial Performance in Well-Trained Cyclists

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000518469.57191.bd ◽

2017 ◽

Vol 49 (5S) ◽

pp. 566

Author(s):

Torben Rokkedal Lausch ◽

Ryan Godsk Larsen ◽

Mathias Krogh Poulsen ◽

Dan Karbing ◽

Lars Pilegaard Thomsen ◽

...

Keyword(s):

Time Trial ◽

Beetroot Juice ◽

Time Trial Performance ◽

Trial Performance

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Chronic high-dose beetroot juice supplementation improves time trial performance of well-trained cyclists in normoxia and hypoxia

Nitric Oxide ◽

10.1016/j.niox.2019.01.011 ◽

2019 ◽

Vol 85 ◽

pp. 44-52 ◽

Cited By ~ 16

Author(s):

Torben Rokkedal-Lausch ◽

Jesper Franch ◽

Mathias K. Poulsen ◽

Lars P. Thomsen ◽

Eddie Weitzberg ◽

...

Keyword(s):

Time Trial ◽

High Dose ◽

Beetroot Juice ◽

Time Trial Performance ◽

Trial Performance

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No Improvement in Endurance Performance after a Single Dose of Beetroot Juice

International Journal of Sport Nutrition and Exercise Metabolism ◽

10.1123/ijsnem.22.6.470 ◽

2012 ◽

Vol 22 (6) ◽

pp. 470-478 ◽

Cited By ~ 80

Author(s):

Naomi M. Cermak ◽

Peter Res ◽

Rudi Stinkens ◽

Jon O. Lundberg ◽

Martin J. Gibala ◽

...

Keyword(s):

Repeated Measures ◽

Time Trial ◽

Endurance Performance ◽

Beetroot Juice ◽

Double Blind ◽

Single Bolus ◽

Time Trial Performance ◽

Subsequent Time ◽

The Impact ◽

Trial Performance

Introduction:Dietary nitrate supplementation has received much attention in the literature due to its proposed ergogenic properties. Recently, the ingestion of a single bolus of nitrate-rich beetroot juice (500 ml, ~6.2 mmol NO3−) was reported to improve subsequent time-trial performance. However, this large volume of ingested beetroot juice does not represent a realistic dietary strategy for athletes to follow in a practical, performancebased setting. Therefore, we investigated the impact of ingesting a single bolus of concentrated nitrate-rich beetroot juice (140 ml, ~8.7 mmol NO3−) on subsequent 1-hr time-trial performance in well-trained cyclists.Methods:Using a double-blind, repeated-measures crossover design (1-wk washout period), 20 trained male cyclists (26 ± 1 yr, VO2peak 60 ± 1 ml · kg−1 · min−1, Wmax 398 ± 7.7 W) ingested 140 ml of concentrated beetroot juice (8.7 mmol NO3−; BEET) or a placebo (nitrate-depleted beetroot juice; PLAC) with breakfast 2.5 hr before an ~1-hr cycling time trial (1,073 ± 21 kJ). Resting blood samples were collected every 30 min after BEET or PLAC ingestion and immediately after the time trial.Results:Plasma nitrite concentration was higher in BEET than PLAC before the onset of the time trial (532 ± 32 vs. 271 ± 13 nM, respectively; p < .001), but subsequent time-trial performance (65.5 ± 1.1 vs. 65 ± 1.1 s), power output (275 ± 7 vs. 278 ± 7 W), and heart rate (170 ± 2 vs. 170 ± 2 beats/min) did not differ between BEET and PLAC treatments (all p > .05).Conclusion:Ingestion of a single bolus of concentrated (140 ml) beetroot juice (8.7 mmol NO3−) does not improve subsequent 1-hr time-trial performance in well-trained cyclists.

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Effect of beetroot supplementation on 10 km time trial performance of distance runners

Research Journal of Pharmacy and Technology ◽

10.52711/0974-360x.2021.01111 ◽

2021 ◽

pp. 6423-6429

Author(s):

Dileep Tirkey ◽

Shabir Kumar Anant ◽

Reeta Venugopal

Keyword(s):

Time Trial ◽

Training Programme ◽

Control Group ◽

Beetroot Juice ◽

Distance Runners ◽

Time Trial Performance ◽

Improved Performance ◽

Group Control Group ◽

Experimental Group ◽

Trial Performance

Objective: To find out the effect of 15 days of beetroot juice (BRJ) supplementation on 10 km time trial performance in trained distance runners of University level.Methods: Thirty trained athletes,15 males age = 26.3 y ± 1.52, height 170.5 ± 0.2 cm, and 15 females, age = 25.2 y ± 1.30, height 157.8 ± 0.3 cm were selected for the present study. Two experimental and two control groups were made consisting of males and females separately. The first group of male and female (Experimental Group) consumed the BRJdaily 250 ml/dayand the second group (Control Group) did not consume beetroot juice. Both groups underwent a regular athletics training programme. All the subjects were tested on Ten Km Time Trial (TT)performance before supplementation of BRJ and after 15 days of supplementation of BRJ. Results: The significant effect of BRJ supplementationwas observed (p < 0.05) between pre and post measures of 10 km TT in experimental group. BRJ supplementation significantly improved performance in 10 km TT in both groups (respectively male; P< 0.006; F=11.09, ES = .480, female; P < 0.000, F=40.45, ES = .771.Conclusion: Consumption of BRJ250 ml/day in improved 10 km time trial performance in traineddistance runners.

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