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      Plasma Oxytocin during Intense Exercise in Professional Cyclists

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          Abstract

          Aims: This study was designed to explore the plasma oxytocin (OT) response to exercise until exhaustion in trained male cyclists. Methods: Twelve professional cyclists (EXP group; age: 26 ± 2 years; VO<sub>2</sub>max: 4,804 ± 549 ml) and 10 sedentary young men (CONT group; age: 23 ± 2 years; VO<sub>2</sub>max: 3,146 ± 602 ml) performed a maximal incremental exercise test on a cycle ergometer. Evaluation was made of the oxygen uptake (VO<sub>2</sub>) and concentrations of blood lactate and plasma OT immediately before, during and immediately after the tests, respectively. Results: Significant increases (p < 0.01) related to exercise were recorded in VO<sub>2</sub> and lactate concentration within each group, while no such changes were observed in OT levels. OT values, on the other hand, were significantly lower (p < 0.01) in EXP than in CONT throughout the tests. Conclusion: It was concluded that plasma OT shows no response to graded exercise until exhaustion in professional cyclists.

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          Most cited references 2

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          Suppression of hypothalmic-pituitary-adrenal axis responses to stress in lactating women

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            Vasopressin and oxytocin—their role in neurotransmission

             R.M. Buijs (1983)
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              Author and article information

              Journal
              HRE
              Horm Res Paediatr
              10.1159/issn.1663-2818
              Hormone Research in Paediatrics
              S. Karger AG
              1663-2818
              1663-2826
              2001
              2001
              03 September 2001
              : 55
              : 3
              : 155-159
              Affiliations
              aDepartamento de Enfermería, and bUnidad de Investigación en Fisiología del Ejercicio, Universidad Complutense de Madrid; cAgrupación Deportiva Banesto; dDepartamento de Toxicología y Legislación Sanitaria, Universidad Complutense de Madrid, and eDepartamento de Ciencias Morfológicas y Fisiología, Universidad Europea de Madrid, Spain
              Article
              49988 Horm Res 2001;55:155–159
              10.1159/000049988
              11549878
              © 2001 S. Karger AG, Basel

              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. 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 government 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. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

              Page count
              Figures: 1, Tables: 1, References: 30, Pages: 5
              Categories
              Original Paper

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