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Maximum voluntary isometric contraction: reference values and clinical application.

Dara Meldrum1, Eibhlis Cahalane, Ronan Conroy

  • 1School of Physiotherapy, Royal College of Surgeons, Dublin, Ireland. smeldrum@rcsi.ie

Amyotrophic Lateral Sclerosis : Official Publication of the World Federation of Neurology Research Group on Motor Neuron Diseases
|March 17, 2007
PubMed
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This study generated crucial reference values for maximum voluntary isometric contraction (MVIC) muscle strength in healthy adults. These new data aid in diagnosing muscle weakness and assessing treatment effectiveness in neuromuscular diseases.

Area of Science:

  • Neurology
  • Physiology
  • Rehabilitation Medicine

Background:

  • Maximum voluntary isometric contraction (MVIC) is vital for assessing muscle strength in neuromuscular disorders.
  • Current interpretation of MVIC values is limited by insufficient normative data.
  • Establishing reliable reference values is essential for clinical application.

Purpose of the Study:

  • To generate comprehensive age- and sex-specific reference values for MVIC across multiple muscle groups.
  • To develop a clinical reporting system for easier interpretation of patient MVIC data.
  • To provide a normative database for diagnosing muscle weakness and evaluating treatment efficacy.

Main Methods:

  • Recruited a convenience sample of 494 healthy adults aged 20-76 years.

Related Experiment Videos

  • Performed bilateral MVIC testing on nine key muscle groups using the Quantitative Muscle Assessment system.
  • Calculated reference values using quantile regression, stratified by age and sex.

    • Main Results:

    • Generated age- and sex-specific reference values for MVIC in neck flexors, shoulder abductors/adductors, elbow/knee flexors/extensors, and hip/ankle flexors.
    • Developed a clinical reporting system to compare patient MVIC results against normal percentiles.
    • Established a robust dataset for normative muscle strength assessment.

    Conclusions:

    • The generated reference values provide a critical tool for identifying and quantifying muscle weakness.
    • This study enhances the clinical utility of MVIC testing in neuromuscular disease management.
    • The findings support improved diagnosis and monitoring of treatment outcomes in patients with muscle weakness.