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

Nitric Oxide ◽  
2019 ◽  
Vol 85 ◽  
pp. 44-52 ◽  
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

Nitrate Supplementation’s Improvement of 10-km Time-Trial Performance in Trained Cyclists

2012 ◽  
Vol 22 (1) ◽  
pp. 64-71 ◽  
Author(s):  
Naomi M. Cermak ◽  
Martin J. Gibala ◽  
Luc J.C. van Loon
Keyword(s):  
Repeated Measures ◽  
Time Trial ◽  
Submaximal Exercise ◽  
Beetroot Juice ◽  
Limited Data ◽  
Double Blind ◽  
Time Trial Performance ◽  
Ergogenic Effects ◽  
Nitrate Supplementation ◽  
Trial Performance

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.

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

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

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

2012 ◽  
Vol 22 (6) ◽  
pp. 470-478 ◽  
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.

scholarly journals One-Week High-Dose β-Alanine Loading Improves World Tour Cyclists’ Time-Trial Performance

Nutrients ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 2543
Author(s):  
Vicente Ávila-Gandía ◽  
Antonio Torregrosa-García ◽  
Silvia Pérez-Piñero ◽  
Raquel Ortolano ◽  
María Salud Abellán-Ruiz ◽  
...  
Keyword(s):  
Sustained Release ◽  
High Performance ◽  
Time Trial ◽  
High Dose ◽  
Mean Power ◽  
Intensive Training ◽  
Time Trial Performance ◽  
Adverse Event Data ◽  
Group A ◽  
Trial Performance

Supplementation with β-alanine is becoming a common practice in high-performance athletes. The purpose of the present study was to investigate the effects of a one-week high-dose β-alanine loading phase employing a sustained-release powder on preserving the time-trial performance capacity of world tour cyclists during overreaching training. Per day, 20 g of sustained-release β-alanine was administered during one week (7 days) of intensive team training camp in a randomised balanced placebo-controlled parallel trial design, with six participants in each β-alanine (BA) or placebo (PLA) group. A 10-min time trial (10′ TT) was carried out to analyse performance and biochemical variables. Anthropometry, paresthesia, and adverse event data were also collected. Power-based relative training load was quantified. Compared to placebo, the BA improved mean power (6.21%, 37.23 W; 95% CI: 3.98–70.48 W, p = 0.046), distance travelled (2.16%, p = 0.046) and total work (4.85%, p = 0.046) without differences in cadence (p = 0.506) or RPE. Lactate (p = 0.036) and anion gap (p = 0.047) were also higher in the BA group, without differences in pH or Bicarbonate. High daily and single doses were well tolerated. One-week high-dose β-alanine loading with a sustained-release powder blend can help attenuate 10′ TT performance losses of world tour cyclists due to intensive training.

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

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.

scholarly journals Effects of a single dose of beetroot juice on cycling time trial performance at ventilatory thresholds intensity in male triathletes

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Manuel Vicente Garnacho-Castaño ◽  
Guillem Palau-Salvà ◽  
Eduardo Cuenca ◽  
Arturo Muñoz-González ◽  
Pablo García-Fernández ◽  
...  
Keyword(s):  
Single Dose ◽  
Time Trial ◽  
Beetroot Juice ◽  
Time Trial Performance ◽  
Cycling Time Trial ◽  
Cycling Time ◽  
Trial Performance

Time-Trial Performance in World-Class Speed Skaters After Chronic Nitrate Ingestion

2018 ◽  
Vol 13 (10) ◽  
pp. 1317-1323 ◽  
Author(s):  
Philippe Richard ◽  
Lymperis P. Koziris ◽  
Mathieu Charbonneau ◽  
Catherine Naulleau ◽  
Jonathan Tremblay ◽  
...  
Keyword(s):  
Recovery Period ◽  
Time Trial ◽  
High Dose ◽  
Limited Data ◽  
Double Blind ◽  
Time Trial Performance ◽  
World Class ◽  
Nitrate Supplementation ◽  
Nitrate And Nitrite ◽  
Trial Performance

Purpose: Nitrate supplementation can increase tolerance to high-intensity work rates; however, limited data exist on the recovery of performance. The authors tested whether 5 d of nitrate supplementation could improve repeated time-trial performance in speed skating. Methods: Using a double-blind, placebo-controlled, crossover design, 9 international-level short-track speed skaters ingested 1 high (juice blend, ∼6.5 mmol nitrate; HI) or low dose (juice blend, ∼1 mmol nitrate; LO) per day on days 1–4. After a double dose of either HI or LO on day 5, athletes performed 2 on-ice 1000-m time trials, separated by 35 min, to simulate competition races. Differences between HI and LO were compared with the smallest practically important difference. Results: Salivary [nitrate] and [nitrite] were higher in HI than LO before the first (nitrate: 81%, effect size [ES]: 1.76; nitrite: 72%, ES: 1.73) and second pursuits (nitrate: 81%, ES: 1.92; nitrite: 71%, ES: 1.78). However, there was no difference in performance in the first (LO: 90.92 [4.08] s; HI: 90.95 [4.06] s, ES: 0.01) or the second time trial (LO: 91.16 [4.06] s; HI: 91.55 [4.40] s, ES: 0.09). Plasma [lactate] measured after the trials (LO: 14.8 [1.1] mM; HI: 14.8 [1.2] mM, ES: 0.01) and at the end of the recovery period (LO: 9.8 [2.1] mM; HI: 10.2 [1.9] mM, ES: 0.05) was not different between treatments. Conclusion: Five days of high-dose nitrate supplementation did not change physiological responses and failed to improve single and repeated time-trial performances in world-class short-track speed skaters. These data suggest that nitrate ingestion up to 6.5 mmol does not enhance recovery from supramaximal exercise in world-class athletes.

scholarly journals High dose Nitrate ingestion does not improve 40 km cycling time trial performance in trained cyclists

2019 ◽  
Vol 28 (1) ◽  
pp. 138-146 ◽  
Author(s):  
S. L. Mosher ◽  
L. A. Gough ◽  
S. Deb ◽  
B. Saunders ◽  
L. R. Mc Naughton ◽  
...  
Keyword(s):  
Time Trial ◽  
High Dose ◽  
Time Trial Performance ◽  
Cycling Time Trial ◽  
Cycling Time ◽  
Trial Performance
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