Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Preload and isometric force variability.

S Kim1, L G Carlton, K M Newell

  • 1University of Illinois at Urbana-Champaign, 61801, USA.

Journal of Motor Behavior
|June 1, 1990
PubMed
Summary

Force variability in isometric contractions is primarily determined by the change in force, with smaller influences from preload and time to peak force. A predictive formula incorporating these factors was developed, highlighting a nonlinear relationship with the rate of force development.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Task experience influences coordinative structures and performance variables in learning a slalom ski-simulator task.

Scandinavian journal of medicine & science in sports·2018
Same author

The pattern of coupling dynamics between postural motion, isotonic hand movements and physiological tremor.

Neuroscience letters·2014
Same author

Motor learning without knowledge of results through the development of a response recognition mechanism.

Journal of motor behavior·2013
Same author

Variability of practice and transfer of training.

Journal of motor behavior·2013
Same author

More on absolute error, etc.

Journal of motor behavior·2013
Same author

Performance criteria for stabilometer learning.

Journal of motor behavior·2013

Area of Science:

  • Biomechanics
  • Motor Control
  • Human Physiology

Background:

  • Isometric force variability is a key aspect of motor control.
  • Understanding factors influencing force variability is crucial for rehabilitation and performance.
  • Previous research has explored various determinants of force output.

Purpose of the Study:

  • To investigate the relative contributions of preload, change of force, and time to peak force on isometric force variability.
  • To develop a predictive model for peak force variability based on these impulse variables.

Main Methods:

  • Two experiments were conducted to manipulate and measure preload, change of force, and time to peak force.
  • Statistical analysis was used to determine the predictive power of each variable on force variability.

Related Experiment Videos

Main Results:

  • Change of force was identified as the strongest predictor of peak force variability.
  • Preload and time to peak force demonstrated smaller, yet significant, systematic effects.
  • A formula was proposed to predict peak force variability, incorporating preload additively with the ratio of change of force to the square root of time to peak force.

Conclusions:

  • Preload, change of force, and time to peak force are significant determinants of isometric force variability.
  • The relationship between the rate of force development and peak force variability is nonlinear.