Coefficient of variation in maximal and feigned static and dynamic grip efforts

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Abstract

The purpose of this study was to investigate the validity of the coefficient of variation as an identifier of feigned grip effort. Seventeen healthy female aged 20 to 25 yr participated in the study. Maximal and feigned efforts were measured isometrically and isokinetically (concentric and eccentric) using the Jamar and KinCom dynamometers, respectively. Findings indicated that, in all situations, the coefficient of variation derived from the maximal effort was significantly (P < 0.0001) lower than that derived from the reigned effort. However, the extent of overlapping between the two was sufficiently large to render the test sensitivities very low. Consequently, regardless of the measurement method, the coefficient of variation is not a valid tool for identifying feigned grip effort in healthy subjects.

Original languageEnglish
Pages (from-to)216-221
Number of pages6
JournalAmerican Journal of Physical Medicine and Rehabilitation
Volume78
Issue number3
DOIs
StatePublished - May 1999

Keywords

  • Coefficient of Variation
  • Effort
  • Grip
  • Isokinetic
  • Isometric

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