Validity of an isometric mid-thigh pull dynamometer in male youth athletes

Hdl Handle:
http://hdl.handle.net/10034/620804
Title:
Validity of an isometric mid-thigh pull dynamometer in male youth athletes
Authors:
Till, Kevin; Morris, R.; Stokes, K.; Trewartha, G.; Twist, Craig; Dobbin, Nick; Hunwicks, Richard; Jones, Ben
Abstract:
The purpose of the present study was to investigate the validity of an isometric mid-thigh pull dynamometer against a criterion measure (i.e., 1,000 Hz force platform) for assessing muscle strength in male youth athletes. Twenty-two male adolescent (age 15.3 ± 0.5 years) rugby league players performed four isometric mid-thigh pull efforts (i.e., two on the dynamometer and two on the force platform) separated by 5 minutes rest in a randomised and counterbalanced order. Mean bias, typical error of estimate (TEE) and Pearson correlation coefficient for peak force (PF) and peak force minus body weight (PFBW) from the force platform were validated against peak force from the dynamometer (DynoPF). When compared to PF and PFBW, mean bias (with 90% Confidence limits) for DynoPF was very large (-32.4 [-34.2 to -30.6] %) and moderate (-10.0 [-12.8 to -7.2] %), respectively. The TEE was moderate for both PF (8.1 [6.3 to 11.2] %) and PFBW (8.9 [7.0 to 12.4]). Correlations between DynoPF and PF (r 0.90 [0.79 to 0.95]) and PFBW (r 0.90 [0.80 to 0.95] were nearly perfect. The isometric mid-thigh pull assessed using a dynamometer underestimated PF and PFBW obtained using a criterion force platform. However, strong correlations between the dynamometer and force platform suggest that a dynamometer provides an appropriate alternative to assess isometric mid-thigh pull strength when a force platform is not available. Therefore, practitioners can use an isometric mid-thigh pull dynamometer to assess strength in the field with youth athletes but should be aware that it underestimates peak force.
Citation:
Till, K., Morris, R., Stokes, K., Trewartha, G., Twist, C., Dobbin, N., Hunwicks, R., & Jones, B. (2017). Validity of an isometric mid-thigh pull dynamometer in male youth athletes. Journal of Strength and Conditioning Research.
Journal:
Journal of Strength and Conditioning Research
Publication Date:
16-Nov-2017
URI:
http://hdl.handle.net/10034/620804
DOI:
10.1519/JSC.0000000000002324
Type:
Article
Language:
en
Description:
This is a non-final version of an article published in final form in Till, K., Morris, R., Stokes, K., Trewartha, G., Twist, C., Dobbin, N., Hunwicks, R., & Jones, B. (2017). Validity of an isometric mid-thigh pull dynamometer in male youth athletes. Journal of Strength and Conditioning Research.
ISSN:
1533-4287
Appears in Collections:
Sport and Exercise Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorTill, Kevinen
dc.contributor.authorMorris, R.en
dc.contributor.authorStokes, K.en
dc.contributor.authorTrewartha, G.en
dc.contributor.authorTwist, Craigen
dc.contributor.authorDobbin, Nicken
dc.contributor.authorHunwicks, Richarden
dc.contributor.authorJones, Benen
dc.date.accessioned2018-01-22T14:56:26Z-
dc.date.available2018-01-22T14:56:26Z-
dc.date.issued2017-11-16-
dc.identifier.citationTill, K., Morris, R., Stokes, K., Trewartha, G., Twist, C., Dobbin, N., Hunwicks, R., & Jones, B. (2017). Validity of an isometric mid-thigh pull dynamometer in male youth athletes. Journal of Strength and Conditioning Research.en
dc.identifier.issn1533-4287-
dc.identifier.doi10.1519/JSC.0000000000002324en
dc.identifier.urihttp://hdl.handle.net/10034/620804-
dc.descriptionThis is a non-final version of an article published in final form in Till, K., Morris, R., Stokes, K., Trewartha, G., Twist, C., Dobbin, N., Hunwicks, R., & Jones, B. (2017). Validity of an isometric mid-thigh pull dynamometer in male youth athletes. Journal of Strength and Conditioning Research.en
dc.description.abstractThe purpose of the present study was to investigate the validity of an isometric mid-thigh pull dynamometer against a criterion measure (i.e., 1,000 Hz force platform) for assessing muscle strength in male youth athletes. Twenty-two male adolescent (age 15.3 ± 0.5 years) rugby league players performed four isometric mid-thigh pull efforts (i.e., two on the dynamometer and two on the force platform) separated by 5 minutes rest in a randomised and counterbalanced order. Mean bias, typical error of estimate (TEE) and Pearson correlation coefficient for peak force (PF) and peak force minus body weight (PFBW) from the force platform were validated against peak force from the dynamometer (DynoPF). When compared to PF and PFBW, mean bias (with 90% Confidence limits) for DynoPF was very large (-32.4 [-34.2 to -30.6] %) and moderate (-10.0 [-12.8 to -7.2] %), respectively. The TEE was moderate for both PF (8.1 [6.3 to 11.2] %) and PFBW (8.9 [7.0 to 12.4]). Correlations between DynoPF and PF (r 0.90 [0.79 to 0.95]) and PFBW (r 0.90 [0.80 to 0.95] were nearly perfect. The isometric mid-thigh pull assessed using a dynamometer underestimated PF and PFBW obtained using a criterion force platform. However, strong correlations between the dynamometer and force platform suggest that a dynamometer provides an appropriate alternative to assess isometric mid-thigh pull strength when a force platform is not available. Therefore, practitioners can use an isometric mid-thigh pull dynamometer to assess strength in the field with youth athletes but should be aware that it underestimates peak force.en
dc.language.isoenen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectStrengthen
dc.subjectPeak forceen
dc.titleValidity of an isometric mid-thigh pull dynamometer in male youth athletesen
dc.typeArticleen
dc.identifier.journalJournal of Strength and Conditioning Researchen
dc.date.accepted2017-11-16-
or.grant.openaccessYesen
rioxxterms.funderUnfundeden
rioxxterms.identifier.projectUnfunded researchen
rioxxterms.versionAMen
rioxxterms.licenseref.startdate2018-11-16en
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