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Reliability and Validity of a New Eccentric Hamstring Strength Measurement Device.

Clare Lodge1, Diarmuid Tobin1, Brian O'Rourke1

  • 1Department of Science and Health, Institute of Technology Carlow, Carlow, Ireland.

Archives of Rehabilitation Research and Clinical Translation
|February 5, 2021
PubMed
Summary

A new device for measuring eccentric hamstring strength demonstrates high reliability and good validity. This tool offers an objective assessment for rehabilitation and management strategies in athletes.

Keywords:
CI, confidence intervalCV, coefficient of varianceClinical decision-makingHamstring musclesICC, intraclass coefficientMDC, minimum detectable changeRehabilitation

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Area of Science:

  • Sports Medicine
  • Biomechanics
  • Rehabilitation Science

Background:

  • Eccentric hamstring strength is crucial for athletic performance and injury prevention.
  • Accurate measurement tools are needed to assess and monitor hamstring function.
  • Existing methods may have limitations in objectivity or practicality.

Purpose of the Study:

  • To evaluate the reliability and validity of a novel device designed for measuring eccentric hamstring strength.
  • To compare measurements from the new device against a gold-standard isokinetic dynamometer.

Main Methods:

  • A randomized double-crossover trial was conducted with 19 male intercollegiate field-sport players.
  • Participants underwent familiarization and three testing sessions over four weeks.
  • Eccentric hamstring strength was measured using both the new device (peak force) and an isokinetic dynamometer (peak torque).
  • Intraclass correlation coefficients (ICCs) were used to assess test-retest reliability and interdevice validity.

Main Results:

  • The new device exhibited high test-retest reliability, with ICCs of .910 (left) and .914 (right).
  • Typical error of measurement was low, indicating precision in repeated measures.
  • Minimum detectable change (MDC) values were established for both limbs.
  • Good validity was demonstrated through significant interdevice correlations (ICCs of .823 for left and .840 for right).

Conclusions:

  • The new eccentric hamstring strength measurement device is reliable and valid.
  • It provides an objective measure of eccentric hamstring strength.
  • This device can be a valuable tool in comprehensive assessments for athlete rehabilitation and management.