T-wave and heart rate variability changes to assess training in world-class athletes.
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| Title: | T-wave and heart rate variability changes to assess training in world-class athletes. |
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| Authors: | Iellamo F (AUTHOR), Pigozzi F (AUTHOR), Spataro A (AUTHOR), Lucini D (AUTHOR), Pagani M (AUTHOR) |
| Source: | Medicine & Science in Sports & Exercise. Aug2004, Vol. 36 Issue 8, p1342-1346. 5p. |
| Abstract: | PURPOSE: A decrease of electrocardiographic T-wave voltage with increasing training loads has been reported in elite endurance athletes and ascribed to training-related adaptation in sympathetic activity to the ventricles. A switch from vagal to sympathetic predominance in sino-atrial node regulation on going from low to peak training load has been reported in world-class rowers. In this study on world-class endurance athletes, we tested the hypothesis that training-induced variations in T-wave amplitude at higher training loads are paralleled by changes in HR spectral profile. METHODS: We studied eight male rowers of the Italian national team in the season culminating with the Rowing World Championship. Athletes were evaluated at 50 and 100% of training load, approximately 20 d before the World Championship, and during the World Championship, when the intensity was markedly reduced. We assessed T-wave maximum amplitude in chest lead V6 and cardiac autonomic regulation by power spectral analysis of R-R interval variability. RESULTS: The increase in training load from 50 to 100% was accompanied by a significant decrease in high frequency and a significant increase in low-frequency R-R variability (in normalized units) with a concomitant significant decrease in T-wave amplitude (microV). Reduction in training load during the World Championship resulted in a return of spectral profile to the level observed at 50% training load and in a partial recovery of T-wave amplitude. HR did not change significantly. CONCLUSIONS: In high-performance world-class athletes, training load simultaneously affects both ventricular repolarization and HR variability patterns possibly through variations in cardiac sympathetic modulation to the ventricles and the sino-atrial node. Information on concomitant changes in ventricular repolarization and autonomic cardiac regulation might be employed to tailor training protocols of elite athletes. [ABSTRACT FROM AUTHOR] |
| Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Education Research Complete |
| FullText | Text: Availability: 0 |
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| Header | DbId: ehh DbLabel: Education Research Complete An: 106574104 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: T-wave and heart rate variability changes to assess training in world-class athletes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Iellamo+F%22">Iellamo F</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pigozzi+F%22">Pigozzi F</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Spataro+A%22">Spataro A</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lucini+D%22">Lucini D</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pagani+M%22">Pagani M</searchLink> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Medicine+%26+Science+in+Sports+%26+Exercise%22">Medicine & Science in Sports & Exercise</searchLink>. Aug2004, Vol. 36 Issue 8, p1342-1346. 5p. – Name: Abstract Label: Abstract Group: Ab Data: PURPOSE: A decrease of electrocardiographic T-wave voltage with increasing training loads has been reported in elite endurance athletes and ascribed to training-related adaptation in sympathetic activity to the ventricles. A switch from vagal to sympathetic predominance in sino-atrial node regulation on going from low to peak training load has been reported in world-class rowers. In this study on world-class endurance athletes, we tested the hypothesis that training-induced variations in T-wave amplitude at higher training loads are paralleled by changes in HR spectral profile. METHODS: We studied eight male rowers of the Italian national team in the season culminating with the Rowing World Championship. Athletes were evaluated at 50 and 100% of training load, approximately 20 d before the World Championship, and during the World Championship, when the intensity was markedly reduced. We assessed T-wave maximum amplitude in chest lead V6 and cardiac autonomic regulation by power spectral analysis of R-R interval variability. RESULTS: The increase in training load from 50 to 100% was accompanied by a significant decrease in high frequency and a significant increase in low-frequency R-R variability (in normalized units) with a concomitant significant decrease in T-wave amplitude (microV). Reduction in training load during the World Championship resulted in a return of spectral profile to the level observed at 50% training load and in a partial recovery of T-wave amplitude. HR did not change significantly. CONCLUSIONS: In high-performance world-class athletes, training load simultaneously affects both ventricular repolarization and HR variability patterns possibly through variations in cardiac sympathetic modulation to the ventricles and the sino-atrial node. Information on concomitant changes in ventricular repolarization and autonomic cardiac regulation might be employed to tailor training protocols of elite athletes. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1249/01.mss.0000135796.75091.8a Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 1342 Titles: – TitleFull: T-wave and heart rate variability changes to assess training in world-class athletes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Iellamo F – PersonEntity: Name: NameFull: Pigozzi F – PersonEntity: Name: NameFull: Spataro A – PersonEntity: Name: NameFull: Lucini D – PersonEntity: Name: NameFull: Pagani M IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2004 Type: published Y: 2004 Identifiers: – Type: issn-print Value: 01959131 Numbering: – Type: volume Value: 36 – Type: issue Value: 8 Titles: – TitleFull: Medicine & Science in Sports & Exercise Type: main |
| ResultId | 1 |
