Impulse variability in isometric tasks

Les G. Carlton, Ky Houng Kim, Yeou Teh Liu, Karl M. Newell

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


An isometric elbow flexion task was used in two experiments that examined the influence of force-production characteristics on impulse variability. Impulse size was held constant while peak force, time to peak force, rate of force, and, hence, the shape of the criterion force-time curve were manipulated. The results indicated that changes in the force-time curve under conditions of equal impulse bring about systematic changes in impulse variability, and this effect is more pronounced for larger impulse conditions. The inability of existing functions to account for the peak force variability findings led to the generation of a new predicted force variability function. The proposed function accounts for changes in the standard deviation and coefficient of variation of peak force, impulse, and rate of force over a range of force-time conditions.

Original languageEnglish
Pages (from-to)33-43
Number of pages11
JournalJournal of Motor Behavior
Issue number1
Publication statusPublished - 1993 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience


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