Absolute and relative reliability of isokinetic and isometric trunk strength testing using the IsoMed-2000 dynamometer

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Absolute and relative reliability of isokinetic and isometric trunk strength testing using the IsoMed-2000 dynamometer. / Roth, Ralf; Donath, Lars; Kurz, Eduard; Zahner, Lukas; Faude, Oliver.

in: Physical Therapy in Sport, Jahrgang 24, 03.2017, S. 26-31.

Publikationen: Beitrag in FachzeitschriftZeitschriftenaufsätzeForschungBegutachtung

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@article{5986b09e6e7d4b10916153d6721eb4cb,
title = "Absolute and relative reliability of isokinetic and isometric trunk strength testing using the IsoMed-2000 dynamometer",
abstract = "OBJECTIVES: The present study aimed to assess the between day reliability of isokinetic and isometric peak torque (PT) during trunk measurement on an isokinetic device (IsoMed 2000).DESIGN: Test-retest-protocol on five separate days.PARTICIPANTS: Fifteen healthy sport students (8 female and 7 male) aged 21 to 26.MAIN OUTCOME MEASURES: PT was assessed in isometric back extension and flexion as well as right and left rotation. Isokinetic strength was captured at a speed of 60°/s and 150°/s for all tasks.RESULTS: For none of the assessed parameters a meaningful variation in PT during test days was observed. Relative reliability (ICC = 0.85-0.96) was excellent for all tasks. Estimates of absolute reliability as Coefficient of Variation (CoV) and Standard Error of Measurement (SEM in Nm/kg lean body mass) remained stable for isometric (6.9{\%} < CoV < 9.4{\%}; 0.15 < SEM < 0.23) and isokinetic mode (60°/s: 3.7{\%} < CoV < 8.6{\%}; 0.08 < SEM < 0.24; 150°/s: 6.9{\%} < CoV < 12.4{\%}; 0.10 < SEM < 0.31). In contrast, reliability between familiarization day and day 1 was lower (6.6{\%} < CoV < 26.2{\%}; 0.10 < SEM < 0.65).CONCLUSIONS: Trunk strength measurement in flexion and extension or trunk rotation in either isometric or isokinetic condition is highly reliable. Therefore, it seems possible to elucidate changes which are smaller than 10{\%} due to intervention programs when a preceding familiarization condition was applied.",
keywords = "Adult, Cross-Sectional Studies, Female, Humans, Isometric Contraction, Male, Muscle Contraction, Muscle Strength, Muscle Strength Dynamometer, Muscle, Skeletal, Reproducibility of Results, Thorax, Torque, Journal Article",
author = "Ralf Roth and Lars Donath and Eduard Kurz and Lukas Zahner and Oliver Faude",
note = "Copyright {\circledC} 2016 Elsevier Ltd. All rights reserved.",
year = "2017",
month = "3",
doi = "10.1016/j.ptsp.2016.11.005",
language = "English",
volume = "24",
pages = "26--31",
journal = "Physical Therapy in Sport",
issn = "1466-853x",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Absolute and relative reliability of isokinetic and isometric trunk strength testing using the IsoMed-2000 dynamometer

AU - Roth, Ralf

AU - Donath, Lars

AU - Kurz, Eduard

AU - Zahner, Lukas

AU - Faude, Oliver

N1 - Copyright © 2016 Elsevier Ltd. All rights reserved.

PY - 2017/3

Y1 - 2017/3

N2 - OBJECTIVES: The present study aimed to assess the between day reliability of isokinetic and isometric peak torque (PT) during trunk measurement on an isokinetic device (IsoMed 2000).DESIGN: Test-retest-protocol on five separate days.PARTICIPANTS: Fifteen healthy sport students (8 female and 7 male) aged 21 to 26.MAIN OUTCOME MEASURES: PT was assessed in isometric back extension and flexion as well as right and left rotation. Isokinetic strength was captured at a speed of 60°/s and 150°/s for all tasks.RESULTS: For none of the assessed parameters a meaningful variation in PT during test days was observed. Relative reliability (ICC = 0.85-0.96) was excellent for all tasks. Estimates of absolute reliability as Coefficient of Variation (CoV) and Standard Error of Measurement (SEM in Nm/kg lean body mass) remained stable for isometric (6.9% < CoV < 9.4%; 0.15 < SEM < 0.23) and isokinetic mode (60°/s: 3.7% < CoV < 8.6%; 0.08 < SEM < 0.24; 150°/s: 6.9% < CoV < 12.4%; 0.10 < SEM < 0.31). In contrast, reliability between familiarization day and day 1 was lower (6.6% < CoV < 26.2%; 0.10 < SEM < 0.65).CONCLUSIONS: Trunk strength measurement in flexion and extension or trunk rotation in either isometric or isokinetic condition is highly reliable. Therefore, it seems possible to elucidate changes which are smaller than 10% due to intervention programs when a preceding familiarization condition was applied.

AB - OBJECTIVES: The present study aimed to assess the between day reliability of isokinetic and isometric peak torque (PT) during trunk measurement on an isokinetic device (IsoMed 2000).DESIGN: Test-retest-protocol on five separate days.PARTICIPANTS: Fifteen healthy sport students (8 female and 7 male) aged 21 to 26.MAIN OUTCOME MEASURES: PT was assessed in isometric back extension and flexion as well as right and left rotation. Isokinetic strength was captured at a speed of 60°/s and 150°/s for all tasks.RESULTS: For none of the assessed parameters a meaningful variation in PT during test days was observed. Relative reliability (ICC = 0.85-0.96) was excellent for all tasks. Estimates of absolute reliability as Coefficient of Variation (CoV) and Standard Error of Measurement (SEM in Nm/kg lean body mass) remained stable for isometric (6.9% < CoV < 9.4%; 0.15 < SEM < 0.23) and isokinetic mode (60°/s: 3.7% < CoV < 8.6%; 0.08 < SEM < 0.24; 150°/s: 6.9% < CoV < 12.4%; 0.10 < SEM < 0.31). In contrast, reliability between familiarization day and day 1 was lower (6.6% < CoV < 26.2%; 0.10 < SEM < 0.65).CONCLUSIONS: Trunk strength measurement in flexion and extension or trunk rotation in either isometric or isokinetic condition is highly reliable. Therefore, it seems possible to elucidate changes which are smaller than 10% due to intervention programs when a preceding familiarization condition was applied.

KW - Adult

KW - Cross-Sectional Studies

KW - Female

KW - Humans

KW - Isometric Contraction

KW - Male

KW - Muscle Contraction

KW - Muscle Strength

KW - Muscle Strength Dynamometer

KW - Muscle, Skeletal

KW - Reproducibility of Results

KW - Thorax

KW - Torque

KW - Journal Article

U2 - 10.1016/j.ptsp.2016.11.005

DO - 10.1016/j.ptsp.2016.11.005

M3 - Journal articles

VL - 24

SP - 26

EP - 31

JO - Physical Therapy in Sport

JF - Physical Therapy in Sport

SN - 1466-853x

ER -

ID: 3378433