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

Mosher, S., Gough, L., Deb, S., Saunders, B., McNaughton, L., Brown, D. and Sparks, S.A. 2020. High dose Nitrate ingestion does not improve 40 km cycling time trial performance in trained cyclists. Research in Sports Medicine: an International Journal. 28 (1), pp. 138-146. https://doi.org/10.1080/15438627.2019.1586707

TitleHigh dose Nitrate ingestion does not improve 40 km cycling time trial performance in trained cyclists
TypeJournal article
AuthorsMosher, S., Gough, L., Deb, S., Saunders, B., McNaughton, L., Brown, D. and Sparks, S.A.
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.

Keywords Beetroot juice, time trial, RPE, cycling, Nitrate ingestion
JournalResearch in Sports Medicine: an International Journal
Journal citation28 (1), pp. 138-146
ISSN1543-8627
Year2020
PublisherTaylor & Francis
Accepted author manuscript
File Access Level
Open (open metadata and files)
Digital Object Identifier (DOI)https://doi.org/10.1080/15438627.2019.1586707
Publication dates
Published online08 Mar 2019
Published in print2020

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