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Related Experiment Video

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Measuring system and method of determining the Adaptive Force.

Laura Schaefer1, Marko Hoff1, Frank Bittmann1

  • 1Section Regulative Physiology and Prevention, Department of Sport and Health Sciences, University of Potsdam, Brandenburg, Germany.

European Journal of Translational Myology
|November 10, 2017
PubMed
Summary

This study introduces a novel pneumatic device to measure Adaptive Force (AF), the nerve-muscle system's adaptation to external forces during muscle actions. The system accurately captures strength without forced motion, proving reliable for diagnostics.

Keywords:
Adaptive Forceisometric eccentric forcemotor controlmuscle actionstrength measurement system

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Area of Science:

  • Neuromuscular Physiology
  • Biomechanics
  • Sports Science

Background:

  • Adaptive Force (AF) is crucial for real-life movements and sports, representing the nerve-muscle system's adaptation to external forces during isometric and eccentric muscle actions.
  • Existing measurement methods may involve forced motion, potentially limiting the assessment of natural neuromuscular responses.
  • Accurate measurement of AF is essential for understanding and enhancing physical performance and rehabilitation.

Observation:

  • A novel measurement system utilizing compressed air was developed and evaluated to assess Adaptive Force (AF).
  • This pneumatic device allows for strength measurement without imposing forced motion, unlike isokinetic systems.
  • The system captures concentric, static, and eccentric strength values, enabling isometric position maintenance under rising external forces.

Findings:

  • Mechanical evaluation demonstrated high consistency (r²=0.94-0.96) and excellent parallel test reliability (ρ=0.976).
  • Biological system evaluation showed very high inter-rater concordance (p=0.001, Cronbach's alpha=0.987).
  • Test-retest reliability over five weeks confirmed the device's stability, with no statistically significant differences observed.

Implications:

  • The validated pneumatic device offers a reliable and innovative tool for measuring Adaptive Force.
  • Its ability to measure strength without forced motion enhances diagnostic accuracy in sports and medicine.
  • This system can be applied to performance diagnostics, aiding in training optimization and injury rehabilitation strategies.