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Related Experiment Videos

Force developmental phase and reliability in explosive and voluntary grip exertions.

S Demura1, S Yamaji, Y Nagasawa

  • 1Kanazawa University.

Perceptual and Motor Skills
|September 22, 2001
PubMed
Summary

This study found that explosive grip exertion is more reliable and faster than voluntary grip exertion for measuring maximal grip strength. Force-time parameters effectively evaluate explosive strength capabilities.

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Area of Science:

  • Biomechanics
  • Human Physiology
  • Sports Science

Background:

  • Grip strength is a crucial indicator of upper limb function.
  • Understanding the reliability and characteristics of different grip exertion types is essential for accurate assessment.
  • Force-time parameters offer detailed insights into muscle contraction dynamics.

Purpose of the Study:

  • To determine the reliability of explosive versus voluntary grip exertions for maximal grip strength.
  • To analyze and compare the force-time patterns of these two grip exertion types.
  • To explore the potential of force-time parameters in evaluating static explosive strength.

Main Methods:

  • 100 healthy young males performed maximal voluntary and explosive grip exertions twice each.

Related Experiment Videos

  • Force-time curves were analyzed using 11 selected parameters.
  • Intraclass correlation coefficients were calculated to assess reliability.

    • Main Results:

    • Both explosive and voluntary grip exertions demonstrated very high reliability for maximal grip strength (ICC = .95, .93).
    • Explosive grip showed smaller trial-to-trial differences and higher exertion pattern reliability compared to voluntary grip.
    • Times to reach maximal grip strength were shorter in explosive exertions, and 8 force-time parameters yielded higher values and reliabilities.

    Conclusions:

    • Explosive grip exertion exhibits superior reliability and distinct force-time characteristics compared to voluntary grip.
    • Force-time parameters derived from explosive exertions are valuable for assessing static explosive strength.
    • These findings support the use of specific force-time parameters for evaluating explosive grip capabilities.