High Dose Nitrate Ingestion Does Not Improve 40 km Cycling Time Trial Performance in Trained Cyclists

Mosher, Scott and Gough, Lewis A. and Deb, Sanjoy and Saunders, Bryan and McNaughton, Lars R and Brown, Danny and Sparks, Andy (2019) High Dose Nitrate Ingestion Does Not Improve 40 km Cycling Time Trial Performance in Trained Cyclists. Research in sports medicine: an international journal.

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(accepted manuscript - pre-print) RSMIJ- Nitrate and 40 km TT Manuscript R2 17 Jan 2019.docx

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This study evaluated the chronic effects of nitrate (NO3-) ingestion over three days, on 40 km TT performance in 11trained cyclists (VO2max: 60.8 ± 7.4 ml.kg-1.min-1; age: 36 ± 9 years; height: 1.80 ± 0.06 m; body mass: 87.2 ± 12.0 kg). Utilising a double blind randomised cross-over design, participants completed three 40 km TT on a Velotron® ergometer following the ingestion of either a 140 ml of “BEET It sport®” NO3- shot containing 12.8 mmol or 800 mg of NO3-, a placebo drink or nothing (control). Performance, oxygen consumption (VO2), blood bicarbonate (HCO3-), pH and lactate (BLa) and ratings of perceived exertion (RPE) were measured every 10 km throughout the TT. The present findings show that NO3- ingestion had no effect on TT performance (NO3-: 4098.0 ± 209.8 vs. Placebo: 4161.9 ± 263.3 s, p = 0.296, ES = 0.11), or VO2 (p = 0.253, ES = 0.13). Similarly, blood lactate and RPE were also unaffected by the experimental conditions (p = 0.522, ES = 0.06; p = 0.085, ES = 0.30) respectively. Therefore, these results suggest that a high dose of NO3- over three days has limited efficacy as an ergogenic aid for 40 km TT cycling performance in trained cyclists.

Item Type: Article
19 January 2019Accepted
8 March 2019Published Online
Subjects: CAH02 - subjects allied to medicine > CAH02-06 - allied health > CAH02-06-02 - nutrition and dietetics
CAH03 - biological and sport sciences > CAH03-01 - biosciences > CAH03-01-02 - biology (non-specific)
CAH03 - biological and sport sciences > CAH03-02 - sport and exercise sciences > CAH03-02-01 - sport and exercise sciences
Divisions: Faculty of Health, Education and Life Sciences > Centre for Life and Sport Sciences (C-LASS)
Depositing User: Lewis Gough
Date Deposited: 08 Apr 2019 08:22
Last Modified: 08 Mar 2022 16:20
URI: https://www.open-access.bcu.ac.uk/id/eprint/7339

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