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

Mosher, Scott and Gough, Lewis 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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Abstract

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
Subjects: B400 Nutrition
C100 Biology
C600 Sports Science
Divisions: REF UoA Output Collections > REF2021 UoA24: Sport and Exercise Sciences, Leisure and Tourism
Depositing User: Lewis Gough
Date Deposited: 08 Apr 2019 08:22
Last Modified: 08 Apr 2019 08:22
URI: http://www.open-access.bcu.ac.uk/id/eprint/7339

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