Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices

Abstract Hamstring injuries are endemic, but influences of test-specific training and the application of different test methods on decision making remain elusive. Sport-students were randomised to isokinetic (IG) or Nordic hamstring (NG) exercise or a control group (CG) for six weeks. Training and t...

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Autores principales:	Hans-Peter Wiesinger, Manuel Scharinger, Alexander Kösters, Christoph Gressenbauer, Erich Müller
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2771af7c7fcd4a1db2d370aff4d42352
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spelling	oai:doaj.org-article:2771af7c7fcd4a1db2d370aff4d423522021-12-02T16:31:51ZSpecificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices10.1038/s41598-021-92929-y2045-2322https://doaj.org/article/2771af7c7fcd4a1db2d370aff4d423522021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92929-yhttps://doaj.org/toc/2045-2322Abstract Hamstring injuries are endemic, but influences of test-specific training and the application of different test methods on decision making remain elusive. Sport-students were randomised to isokinetic (IG) or Nordic hamstring (NG) exercise or a control group (CG) for six weeks. Training and testing procedures were matched to biomechanical parameters. Hamstring strength (EPT), work, muscle soreness (visual analogue scale (VAS)), biceps femoris (BFlh) muscle size and architecture were assessed. Anthropometrics and strength parameters did not differ at baseline. Yet, body mass normalised EPT, and work revealed a significant group × time × device effect, with a significant main effect for devices. Experimental conditions triggered meaningful increases in EPT compared to the control group, but the effects were higher when recorded on the training device. Despite significant group × time interactions, normalised average work on the NHD was only higher in the NG compared to CG of the left leg (+ 35%). No effects were found for BFlh parameters. Hamstrings showed a high training specificity, but adaptations likely remain undetected owing to the low sensitivity of conventional test devices. Moreover, strength increase of ~ 15% does not necessarily have to be reflected in BFlh parameters.Hans-Peter WiesingerManuel ScharingerAlexander KöstersChristoph GressenbauerErich MüllerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hans-Peter Wiesinger Manuel Scharinger Alexander Kösters Christoph Gressenbauer Erich Müller Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
description	Abstract Hamstring injuries are endemic, but influences of test-specific training and the application of different test methods on decision making remain elusive. Sport-students were randomised to isokinetic (IG) or Nordic hamstring (NG) exercise or a control group (CG) for six weeks. Training and testing procedures were matched to biomechanical parameters. Hamstring strength (EPT), work, muscle soreness (visual analogue scale (VAS)), biceps femoris (BFlh) muscle size and architecture were assessed. Anthropometrics and strength parameters did not differ at baseline. Yet, body mass normalised EPT, and work revealed a significant group × time × device effect, with a significant main effect for devices. Experimental conditions triggered meaningful increases in EPT compared to the control group, but the effects were higher when recorded on the training device. Despite significant group × time interactions, normalised average work on the NHD was only higher in the NG compared to CG of the left leg (+ 35%). No effects were found for BFlh parameters. Hamstrings showed a high training specificity, but adaptations likely remain undetected owing to the low sensitivity of conventional test devices. Moreover, strength increase of ~ 15% does not necessarily have to be reflected in BFlh parameters.
format	article
author	Hans-Peter Wiesinger Manuel Scharinger Alexander Kösters Christoph Gressenbauer Erich Müller
author_facet	Hans-Peter Wiesinger Manuel Scharinger Alexander Kösters Christoph Gressenbauer Erich Müller
author_sort	Hans-Peter Wiesinger
title	Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
title_short	Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
title_full	Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
title_fullStr	Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
title_full_unstemmed	Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
title_sort	specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2771af7c7fcd4a1db2d370aff4d42352
work_keys_str_mv	AT hanspeterwiesinger specificityofeccentrichamstringtrainingandthelackofconsistencybetweenstrengthassessmentsusingconventionaltestdevices AT manuelscharinger specificityofeccentrichamstringtrainingandthelackofconsistencybetweenstrengthassessmentsusingconventionaltestdevices AT alexanderkosters specificityofeccentrichamstringtrainingandthelackofconsistencybetweenstrengthassessmentsusingconventionaltestdevices AT christophgressenbauer specificityofeccentrichamstringtrainingandthelackofconsistencybetweenstrengthassessmentsusingconventionaltestdevices AT erichmuller specificityofeccentrichamstringtrainingandthelackofconsistencybetweenstrengthassessmentsusingconventionaltestdevices
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Specificity of eccentric hamstring training and the lack of consistency between strength assessments using conventional test devices

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