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Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners

BACKGROUND: Blueberries are concentrated with anthocyanins possessing antioxidant properties. As these properties counter fatigue, blueberry supplementation may improve performance and recovery, particularly in hypoxia, where oxidative stress is elevated. METHODS: This study examined the effects of...

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Autores principales: Brandenburg, Jason P., Giles, Luisa V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8008513/
https://www.ncbi.nlm.nih.gov/pubmed/33781280
http://dx.doi.org/10.1186/s12970-021-00423-7
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author Brandenburg, Jason P.
Giles, Luisa V.
author_facet Brandenburg, Jason P.
Giles, Luisa V.
author_sort Brandenburg, Jason P.
collection PubMed
description BACKGROUND: Blueberries are concentrated with anthocyanins possessing antioxidant properties. As these properties counter fatigue, blueberry supplementation may improve performance and recovery, particularly in hypoxia, where oxidative stress is elevated. METHODS: This study examined the effects of blueberry supplementation on running performance, physiological responses, and recovery in normobaric hypoxia. Eleven experienced runners completed a 30-minute time-trial (TT) in normobaric hypoxia (%O(2) = 15.5 %) on separate days after supplementation with four days of blueberries (BLU) or four days of placebo (PLA). Heart rate (HR), oxygen saturation (SaO(2)) and ratings of perceived exertion (RPE) were monitored during the TT. Blood lactate and fraction of exhaled nitric oxide (F(ENO)) were assessed pre-TT, post-TT, and during recovery. RESULTS: No significant differences were observed in the distance run during the TT, HR, SaO(2), and RPE. The post-TT increase in blood lactate was significantly lower in BLU than PLA (p = 0.036). Pre-TT and post-TT F(ENO) did not differ between conditions. Blood lactate recovery following the TT was similar between conditions. CONCLUSIONS: Four days of blueberry supplementation did not alter running performance or cardiovascular and perceptual responses in normobaric hypoxia. Supplementation lowered the blood lactate response to running, however, the significance of this finding is uncertain given the absence of an ergogenic effect.
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spelling pubmed-80085132021-03-30 Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners Brandenburg, Jason P. Giles, Luisa V. J Int Soc Sports Nutr Research Article BACKGROUND: Blueberries are concentrated with anthocyanins possessing antioxidant properties. As these properties counter fatigue, blueberry supplementation may improve performance and recovery, particularly in hypoxia, where oxidative stress is elevated. METHODS: This study examined the effects of blueberry supplementation on running performance, physiological responses, and recovery in normobaric hypoxia. Eleven experienced runners completed a 30-minute time-trial (TT) in normobaric hypoxia (%O(2) = 15.5 %) on separate days after supplementation with four days of blueberries (BLU) or four days of placebo (PLA). Heart rate (HR), oxygen saturation (SaO(2)) and ratings of perceived exertion (RPE) were monitored during the TT. Blood lactate and fraction of exhaled nitric oxide (F(ENO)) were assessed pre-TT, post-TT, and during recovery. RESULTS: No significant differences were observed in the distance run during the TT, HR, SaO(2), and RPE. The post-TT increase in blood lactate was significantly lower in BLU than PLA (p = 0.036). Pre-TT and post-TT F(ENO) did not differ between conditions. Blood lactate recovery following the TT was similar between conditions. CONCLUSIONS: Four days of blueberry supplementation did not alter running performance or cardiovascular and perceptual responses in normobaric hypoxia. Supplementation lowered the blood lactate response to running, however, the significance of this finding is uncertain given the absence of an ergogenic effect. BioMed Central 2021-03-30 /pmc/articles/PMC8008513/ /pubmed/33781280 http://dx.doi.org/10.1186/s12970-021-00423-7 Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Brandenburg, Jason P.
Giles, Luisa V.
Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
title Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
title_full Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
title_fullStr Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
title_full_unstemmed Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
title_short Blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
title_sort blueberry supplementation reduces the blood lactate response to running in normobaric hypoxia but has no effect on performance in recreational runners
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8008513/
https://www.ncbi.nlm.nih.gov/pubmed/33781280
http://dx.doi.org/10.1186/s12970-021-00423-7
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