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Beetroot supplementation improves the physiological responses to incline walking

Mark Waldron Orcid Logo, Luke Waldron, Craig Lawlor, Adrian Gray, Jamie Highton

European Journal of Applied Physiology, Volume: 118, Issue: 6, Pages: 1131 - 1141

Swansea University Author: Mark Waldron Orcid Logo

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DOI (Published version): 10.1007/s00421-018-3843-x

Abstract

PURPOSE:We investigated the effects of an acute 24-h nitrate-rich beetroot juice supplement (BR) on the energy cost, exercise efficiency and blood pressure responses to intermittent walking at different gradients.METHODS:In a double-blind, cross-over design, eight participants were provided with a t...

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Published in: European Journal of Applied Physiology
ISSN: 1439-6319 1439-6327
Published: Springer 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa51428
first_indexed 2019-08-15T21:29:49Z
last_indexed 2019-09-03T20:47:25Z
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spelling 2019-09-03T15:50:48.2995938 v2 51428 2019-08-15 Beetroot supplementation improves the physiological responses to incline walking 70db7c6c54d46f5e70b39e5ae0a056fa 0000-0002-2720-4615 Mark Waldron Mark Waldron true false 2019-08-15 EAAS PURPOSE:We investigated the effects of an acute 24-h nitrate-rich beetroot juice supplement (BR) on the energy cost, exercise efficiency and blood pressure responses to intermittent walking at different gradients.METHODS:In a double-blind, cross-over design, eight participants were provided with a total of 350 ml of nitrate-rich (~ 20.5 mmol nitrate) BR or placebo (PLA) across 24 h before completing intermittent walking at 3 km/h on treadmill at gradients of 1, 5, 10, 15 and 20%.RESULTS:Resting mean arterial pressure (MAP) was ~ 4.1% lower after BR (93 vs. 89 mmHg; P = 0.001), as well as during exercise (102 vs. 99 mmHg; P = 0.011) and recovery (97 vs. 94 mmHg; P = 0.001). Exercising (1227 vs. 1129 ml/min P < 0.001) and end-stage (1404 vs. 1249 ml/min; P = 0.002) oxygen uptake ([Formula: see text]O2) was lower in BR compared to PLA, which was accompanied by an average reduction in phase II [Formula: see text]O2 amplitude (1067 vs. 940 ml/min; P = 0.025). Similarly, recovery [Formula: see text]O2 (509 vs. 458 ml/min; P = 0.001) was lower in BR. Whole blood potassium concentration increased from pre-post exercise in PLA (4.1 ± 0.3 vs. 4.5 ± 0.3 mmol/L; P = 0.013) but not BR (4.1 ± 0.31 vs. 4.3 ± 0.2 mmol/L; P = 0.188).CONCLUSIONS:Energy cost of exercise, recovery of [Formula: see text]O2, MAP and blood markers were ameliorated after BR. Previously-reported mechanisms explain these findings, which are more noticeable during less-efficient walking at steep gradients (15-20%). These findings have practical implications for hill-walkers. Journal Article European Journal of Applied Physiology 118 6 1131 1141 Springer 1439-6319 1439-6327 Blood pressure; Efficiency; Energy cost; Nitrate 15 3 2018 2018-03-15 10.1007/s00421-018-3843-x https://link.springer.com/article/10.1007%2Fs00421-018-3843-x COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2019-09-03T15:50:48.2995938 2019-08-15T16:55:12.7088403 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences Mark Waldron 0000-0002-2720-4615 1 Luke Waldron 2 Craig Lawlor 3 Adrian Gray 4 Jamie Highton 5 0051428-15082019170259.pdf WalronEJAP-D-17-00916.pdf 2019-08-15T17:02:59.0200000 Output 2098034 application/pdf Accepted Manuscript true 2019-03-09T00:00:00.0000000 true eng
title Beetroot supplementation improves the physiological responses to incline walking
spellingShingle Beetroot supplementation improves the physiological responses to incline walking
Mark Waldron
title_short Beetroot supplementation improves the physiological responses to incline walking
title_full Beetroot supplementation improves the physiological responses to incline walking
title_fullStr Beetroot supplementation improves the physiological responses to incline walking
title_full_unstemmed Beetroot supplementation improves the physiological responses to incline walking
title_sort Beetroot supplementation improves the physiological responses to incline walking
author_id_str_mv 70db7c6c54d46f5e70b39e5ae0a056fa
author_id_fullname_str_mv 70db7c6c54d46f5e70b39e5ae0a056fa_***_Mark Waldron
author Mark Waldron
author2 Mark Waldron
Luke Waldron
Craig Lawlor
Adrian Gray
Jamie Highton
format Journal article
container_title European Journal of Applied Physiology
container_volume 118
container_issue 6
container_start_page 1131
publishDate 2018
institution Swansea University
issn 1439-6319
1439-6327
doi_str_mv 10.1007/s00421-018-3843-x
publisher Springer
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences
url https://link.springer.com/article/10.1007%2Fs00421-018-3843-x
document_store_str 1
active_str 0
description PURPOSE:We investigated the effects of an acute 24-h nitrate-rich beetroot juice supplement (BR) on the energy cost, exercise efficiency and blood pressure responses to intermittent walking at different gradients.METHODS:In a double-blind, cross-over design, eight participants were provided with a total of 350 ml of nitrate-rich (~ 20.5 mmol nitrate) BR or placebo (PLA) across 24 h before completing intermittent walking at 3 km/h on treadmill at gradients of 1, 5, 10, 15 and 20%.RESULTS:Resting mean arterial pressure (MAP) was ~ 4.1% lower after BR (93 vs. 89 mmHg; P = 0.001), as well as during exercise (102 vs. 99 mmHg; P = 0.011) and recovery (97 vs. 94 mmHg; P = 0.001). Exercising (1227 vs. 1129 ml/min P < 0.001) and end-stage (1404 vs. 1249 ml/min; P = 0.002) oxygen uptake ([Formula: see text]O2) was lower in BR compared to PLA, which was accompanied by an average reduction in phase II [Formula: see text]O2 amplitude (1067 vs. 940 ml/min; P = 0.025). Similarly, recovery [Formula: see text]O2 (509 vs. 458 ml/min; P = 0.001) was lower in BR. Whole blood potassium concentration increased from pre-post exercise in PLA (4.1 ± 0.3 vs. 4.5 ± 0.3 mmol/L; P = 0.013) but not BR (4.1 ± 0.31 vs. 4.3 ± 0.2 mmol/L; P = 0.188).CONCLUSIONS:Energy cost of exercise, recovery of [Formula: see text]O2, MAP and blood markers were ameliorated after BR. Previously-reported mechanisms explain these findings, which are more noticeable during less-efficient walking at steep gradients (15-20%). These findings have practical implications for hill-walkers.
published_date 2018-03-15T04:41:17Z
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score 11.089386

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