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Download fileInfluence of sex and acute beetroot juice supplementation on 2 KM running performance
journal contribution
posted on 2021-01-26, 14:33 authored by Arturo Casado, Raúl Domínguez, Sandro Fernandes Da Silva, Stephen BaileyStephen BaileyPurpose: To assess the effect of acute nitrate-rich (BJ) and nitrate-depleted (PL) beetroot
juice ingestion on 2 km running performance in amateur runners, and to what extent the ergogenic
effect of BJ supplementation would be influenced by the sex of the participants; Methods: Twentyfour amateur long-distance runners (14 males and 10 females) performed a 2 km time trial (TT)
on an outdoor athletics track 2.5 h after ingesting either 140 mL of BJ (~12.8 mmol NO3
−) or PL.
After the tests, blood [lactate] and ratings of perceived exertion (RPE) related to the leg muscles
(RPEmuscular), cardiovascular system (RPEcardio) and general overall RPE (RPEgeneral) were assessed;
Results: Compared to PL, BJ supplementation improved 2 km TT performance in both males
(p < 0.05) with no supplement × sex interaction effect (p > 0.05). This improvement in 2 km running
performance was a function of improved performance in the second 1 km split time in both males
and females (p < 0.05). Supplementation with BJ did not alter post-exercise blood [lactate] (p > 0.05)
but lowered RPEgeneral (p < 0.05); Conclusions: acute BJ supplementation improves 2 km running
performance in amateur runners by enhancing performance over the second half of the TT and
lowering RPEgeneral by a comparable magnitude in males and females.
History
School
- Sport, Exercise and Health Sciences
Published in
Applied SciencesVolume
11Issue
3Publisher
MDPI AGVersion
- VoR (Version of Record)
Rights holder
© The authorsPublisher statement
This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2021-01-18Publication date
2021-01-22Copyright date
2021ISSN
2076-3417Publisher version
Language
- en