Reference values for isometric muscle force among workers for the Netherlands: a comparison of reference values

Rob Douma, Remko Soer, Wim Krijnen, Michiel Reneman, Cees van der Schans

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

BACKGROUND: Muscle force is important for daily life and sports and can be measured with a handheld dynamometer. Reference values are employed to quantify a subject's muscle force. It is not unambiguous whether reference values can be generalized to other populations. Objectives in this study were; first to confirm the reliability of the utilization of hand-held dynamometers for isometric strength measurement; second to determine reference values for a population of Dutch workers; third to compare these values with those of a USA population.

METHODS: 462 Healthy working subjects (259 male, 203 female) were included in this study. Their age ranged from 20 to 60 years with a mean (sd) of 41 (11) years. Muscle force values from elbow flexion and extension, knee flexion and extension, and shoulder abduction were measured with the break method using a MicroFet 2 hand-held dynamometer. Reliability was analyzed by calculating ICC's and limits of agreement. Muscle force expressed in Newton, means, and confidence intervals were determined for males and females in age groups ranging from twenty to sixty years old. Regression equations and explained variances were calculated from weight, height, age, and gender. The mean values and 95% CI were compared to the results from other studies.

RESULTS: Reliability was good; the ICC ranged between 0.83 to 0.94. The explained variance ranged from 0.25 to 0.51. Comparison of data for the Dutch population mean muscle force values with those from the USA revealed important differences between muscle force reference values for the American and Dutch populations.

CONCLUSIONS: Muscle force measurements demonstrate a sound reliability. Reference values and regressions equations are made available for the Dutch population. Comparison with other studies indicates that reference values differ between countries.

Original languageEnglish
Number of pages10
JournalBMC sports science, medicine and rehabilitation
Volume6
Issue number10
DOIs
Publication statusPublished - 25 Feb 2014

Keywords

  • muscle force
  • reference values
  • dynamometer
  • contraction

Cite this

@article{95d9afe908a343d5bd0356331475e124,
title = "Reference values for isometric muscle force among workers for the Netherlands: a comparison of reference values",
abstract = "BACKGROUND: Muscle force is important for daily life and sports and can be measured with a handheld dynamometer. Reference values are employed to quantify a subject's muscle force. It is not unambiguous whether reference values can be generalized to other populations. Objectives in this study were; first to confirm the reliability of the utilization of hand-held dynamometers for isometric strength measurement; second to determine reference values for a population of Dutch workers; third to compare these values with those of a USA population.METHODS: 462 Healthy working subjects (259 male, 203 female) were included in this study. Their age ranged from 20 to 60 years with a mean (sd) of 41 (11) years. Muscle force values from elbow flexion and extension, knee flexion and extension, and shoulder abduction were measured with the break method using a MicroFet 2 hand-held dynamometer. Reliability was analyzed by calculating ICC's and limits of agreement. Muscle force expressed in Newton, means, and confidence intervals were determined for males and females in age groups ranging from twenty to sixty years old. Regression equations and explained variances were calculated from weight, height, age, and gender. The mean values and 95{\%} CI were compared to the results from other studies.RESULTS: Reliability was good; the ICC ranged between 0.83 to 0.94. The explained variance ranged from 0.25 to 0.51. Comparison of data for the Dutch population mean muscle force values with those from the USA revealed important differences between muscle force reference values for the American and Dutch populations.CONCLUSIONS: Muscle force measurements demonstrate a sound reliability. Reference values and regressions equations are made available for the Dutch population. Comparison with other studies indicates that reference values differ between countries.",
keywords = "spierkracht, referentiewaarden, dynamometer, samentrekking, muscle force, reference values, dynamometer, contraction",
author = "Rob Douma and Remko Soer and Wim Krijnen and Michiel Reneman and {van der Schans}, Cees",
year = "2014",
month = "2",
day = "25",
doi = "10.1186/2052-1847-6-10",
language = "English",
volume = "6",
journal = "BMC sports science, medicine and rehabilitation",
issn = "2052-1847",
publisher = "BioMed Central",
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}

Reference values for isometric muscle force among workers for the Netherlands : a comparison of reference values. / Douma, Rob; Soer, Remko; Krijnen, Wim; Reneman, Michiel; van der Schans, Cees.

In: BMC sports science, medicine and rehabilitation, Vol. 6, No. 10, 25.02.2014.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Reference values for isometric muscle force among workers for the Netherlands

T2 - a comparison of reference values

AU - Douma, Rob

AU - Soer, Remko

AU - Krijnen, Wim

AU - Reneman, Michiel

AU - van der Schans, Cees

PY - 2014/2/25

Y1 - 2014/2/25

N2 - BACKGROUND: Muscle force is important for daily life and sports and can be measured with a handheld dynamometer. Reference values are employed to quantify a subject's muscle force. It is not unambiguous whether reference values can be generalized to other populations. Objectives in this study were; first to confirm the reliability of the utilization of hand-held dynamometers for isometric strength measurement; second to determine reference values for a population of Dutch workers; third to compare these values with those of a USA population.METHODS: 462 Healthy working subjects (259 male, 203 female) were included in this study. Their age ranged from 20 to 60 years with a mean (sd) of 41 (11) years. Muscle force values from elbow flexion and extension, knee flexion and extension, and shoulder abduction were measured with the break method using a MicroFet 2 hand-held dynamometer. Reliability was analyzed by calculating ICC's and limits of agreement. Muscle force expressed in Newton, means, and confidence intervals were determined for males and females in age groups ranging from twenty to sixty years old. Regression equations and explained variances were calculated from weight, height, age, and gender. The mean values and 95% CI were compared to the results from other studies.RESULTS: Reliability was good; the ICC ranged between 0.83 to 0.94. The explained variance ranged from 0.25 to 0.51. Comparison of data for the Dutch population mean muscle force values with those from the USA revealed important differences between muscle force reference values for the American and Dutch populations.CONCLUSIONS: Muscle force measurements demonstrate a sound reliability. Reference values and regressions equations are made available for the Dutch population. Comparison with other studies indicates that reference values differ between countries.

AB - BACKGROUND: Muscle force is important for daily life and sports and can be measured with a handheld dynamometer. Reference values are employed to quantify a subject's muscle force. It is not unambiguous whether reference values can be generalized to other populations. Objectives in this study were; first to confirm the reliability of the utilization of hand-held dynamometers for isometric strength measurement; second to determine reference values for a population of Dutch workers; third to compare these values with those of a USA population.METHODS: 462 Healthy working subjects (259 male, 203 female) were included in this study. Their age ranged from 20 to 60 years with a mean (sd) of 41 (11) years. Muscle force values from elbow flexion and extension, knee flexion and extension, and shoulder abduction were measured with the break method using a MicroFet 2 hand-held dynamometer. Reliability was analyzed by calculating ICC's and limits of agreement. Muscle force expressed in Newton, means, and confidence intervals were determined for males and females in age groups ranging from twenty to sixty years old. Regression equations and explained variances were calculated from weight, height, age, and gender. The mean values and 95% CI were compared to the results from other studies.RESULTS: Reliability was good; the ICC ranged between 0.83 to 0.94. The explained variance ranged from 0.25 to 0.51. Comparison of data for the Dutch population mean muscle force values with those from the USA revealed important differences between muscle force reference values for the American and Dutch populations.CONCLUSIONS: Muscle force measurements demonstrate a sound reliability. Reference values and regressions equations are made available for the Dutch population. Comparison with other studies indicates that reference values differ between countries.

KW - spierkracht

KW - referentiewaarden

KW - dynamometer

KW - samentrekking

KW - muscle force

KW - reference values

KW - dynamometer

KW - contraction

U2 - 10.1186/2052-1847-6-10

DO - 10.1186/2052-1847-6-10

M3 - Article

VL - 6

JO - BMC sports science, medicine and rehabilitation

JF - BMC sports science, medicine and rehabilitation

SN - 2052-1847

IS - 10

ER -