Isokinetic trunk flexion-extension protocol to assess trunk muscle strength and endurance:Reliability,learning effect,and sex differences  

作　　者：María Pilar García-Vaquero David Barbado Casto Juan-Recio Alejandro López-Valenciano Francisco J.Vera-Garcia 

机构地区：[1]Sports Research Centre,Miguel Hernandez University of Elche,Elche,03202,Spain

出　　处：《Journal of Sport and Health Science》2020年第6期692-701,共10页运动与健康科学（英文）

基　　金：the financial support of Ministerio de Ciencia e Innovación(DEP2010-16493);Generalitat Valenciana(ACOMP/2011/130);Spain.Casto Juan-Recio and Alejandro López-Valenciano were supported by predoctoral grants given by Generalitat Valenciana(Val i+d)(ACOMP/2011/130);Ministerio de Educacion,Cultura y Deporte(FPU)(DEP2010-16493)。

摘　　要：Purpose:The purpose of this study was to examine the reliability and the learning effect of an isokinetic trunk flexion-extension protocol designed to simultaneously assess trunk muscle strength and endurance.In addition,the effect of the participants’sex on the reliability data was examined.Methods:Fifty-seven healthy and physically active young men(n=28)and women(n=29)performed the isokinetic protocol 5 times,separated by a week between each of the first 4 sessions and by a month between the last 2 sessions.The protocol consisted of performing 4 trials of 15 maximum flexion-extension concentric exertions at 120°/s(range of trunk motion=50°).The absolute and relative peak torque and total work were calculated to assess trunk flexion and extension strength.In addition,endurance ratio,modified endurance ratio,fatigue final ratio,recovery ratio,and modified recovery ratio variables were used for the assessment of trunk muscle endurance in both directions.Results:Regarding the absolute reliability,no relevant changes were found between paired-comparison sessions for most strength and endurance variables,except for total work and relative total work variables in the flexion movement in both sexes.In addition,the typical error of the isokinetic variables was lower than 10%in both males and females,and minimum detectable changes ranged from 7%to 20%,with a tendency to be higher in females and in endurance variables.The strength variables showed high-to-excellent intraclass correlation coefficients(ICCs;>0.74);however,for the endurance variables only the endurance ratio and the modified endurance ratio obtained moderate-to-high ICC values(0.57<ICC<0.82).In addition,the analysis of the variance reported no significant differences between consecutive pairs of sessions for most variables in both sexes.Conclusion:Overall,these findings provide clinicians,trainers,and researchers with a 10-min single-session protocol to perform a reliable muscle strength and endurance evaluation of trunk flexor and extensor muscles,all w

关 键 词：Core muscles Fitness Isokinetic dynamometry Performance SPINE Testing 

分 类 号：G804.6[文化科学—运动人体科学]