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Acute Topics in Sport Nutrition

Editor(s): Lamprecht M. (Graz) 
Table of Contents
Vol. 59, 2012
Section title: Selected Off-Mainstream Sport Supplements
Lamprecht M (ed): Acute Topics in Sport Nutrition. Med Sport Sci. Basel, Karger, 2012, vol 59, pp 29–35
(DOI:10.1159/000342062)

Dietary Nitrate and O2 Consumption during Exercise

Jones A.M. · Bailey S.J. · Vanhatalo A.
Sport and Health Sciences, College of Life and Environmental Sciences, St. Luke’s Campus, University of Exeter, Exeter, UK

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Article / Publication Details

First-Page Preview
Abstract of Selected Off-Mainstream Sport Supplements

Published online: 10/15/2012
Cover Date: 2012

Number of Print Pages: 7
Number of Figures: 2
Number of Tables: 0

ISBN: 978-3-8055-9992-4 (Print)
eISBN: 978-3-8055-9993-1 (Online)

Abstract

Recent studies have investigated the influence of dietary nitrate supplementation on the physiological responses to exercise. Specifically, it has been reported that enhancing nitric oxide (NO) bioavailability through supplementation of the diet with nitrate salts or nitrate-rich beetroot juice reduces the O2 cost of exercise and improves exercise performance. The lower O2 cost for a given sub-maximal work rate following nitrate ingestion indicates that muscle efficiency is enhanced either as a consequence of a reduced energy cost of contraction or enhanced mitochondrial efficiency. The positive effects of nitrate supplementation on the O2 cost of sub-maximal exercise can be manifested acutely (i.e. 2.5 h following ingestion) and maintained for at least 15 days if supplementation is continued. Most recently, the influence of dietary nitrate supplementation on time trial performance in competitive cyclists has been investigated. Studies have shown a 1–2% reduction in the time to complete time trial distances between 4 and 16 km. The dose of nitrate that has been shown to improve exercise efficiency can readily be achieved through the consumption of 0.5 litre of beetroot juice or an equivalent high-nitrate foodstuff. Following a 5- to 6-mmol bolus of nitrate, plasma [nitrite] typically peaks within 2–3 h and remains elevated for a further 6–9 h before declining towards baseline. Therefore, consuming nitrate approximately 3 h prior to competition or training is recommended if athletes wish to explore the ergogenic potential of nitrate supplementation.


  

Author Contacts

Andrew M. Jones, PhD, Prof., Sport and Health Sciences, University of Exeter, Heavitree Road, Exeter EX1 2LU (UK), E-Mail a.m.jones@exeter.ac.uk

  

Article Information

Number of Print Pages : 7

  

Publication Details

Book Serie: Medicine and Sport Science, Vol. 59, Year 2012

Editor(s): Lamprecht, M. (Graz)
ISSN: 0254-5020 (Print), eISSN: 1662-2812 (Online)

For additional information:
http://content.karger.com/ProdukteDB/produkte.asp?issn=0254-5020

Book Title: Acute Topics in Sport Nutrition

Editor(s): Lamprecht M (ed)

For additional information:
http://content.karger.com/ProdukteDB/produkte.asp?issn=0254-5020&volume=59


Article / Publication Details

First-Page Preview
Abstract of Selected Off-Mainstream Sport Supplements

Published online: 10/15/2012
Cover Date: 2012

Number of Print Pages: 7
Number of Figures: 2
Number of Tables: 0

ISBN: 978-3-8055-9992-4 (Print)
eISBN: 978-3-8055-9993-1 (Online)


Copyright / Drug Dosage

Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in goverment regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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