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Related Experiment Videos

Which setting of the dynamometer provides maximal grip strength?

J C Firrell1, G M Crain

  • 1Christine M. Kleinert Institute for Hand and Micro Surgery, University of Louisville School of Medicine, KY 40202, USA.

The Journal of Hand Surgery
|May 1, 1996
PubMed
Summary

Setting II on clinical dynamometers captures maximal grip strength in most individuals. Routine measurement at this setting is recommended, as personal characteristics do not reliably predict optimal grip strength measurement.

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Area of Science:

  • Orthopedics
  • Rehabilitation Medicine
  • Biomechanics

Background:

  • Grip strength is a key indicator of upper limb function.
  • Accurate measurement requires optimal clinical dynamometer settings.
  • Individual characteristics may influence maximal grip strength readings.

Purpose of the Study:

  • Determine the optimal clinical dynamometer setting for maximal grip strength.
  • Correlate the optimal setting with individual characteristics (age, weight, height, hand size).

Main Methods:

  • Utilized a computerized isometric dynamometer to measure maximal grip strength.
  • Tested 288 asymptomatic hands across five dynamometer size settings.
  • Analyzed grip strength data in relation to participant demographics and anthropometrics.

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Main Results:

  • 89% of participants achieved maximal grip strength at setting II.
  • Lower body weight and height were observed in individuals with maximal strength at setting I compared to setting II.
  • No significant correlation was found between body mass, hand size, and the optimal dynamometer setting.
  • Underestimating maximal grip strength by using only setting II occurred in ~10% of individuals, with small error margins (2-24%).

Conclusions:

  • Clinical dynamometer setting II is generally optimal for maximal grip strength assessment.
  • Predicting the optimal setting based on individual features is not reliable.
  • Routine measurement of grip strength at setting II is recommended for all patients, regardless of their characteristics.