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

Poor correlations between isometric tests and dynamic performance: relationship to muscle activation

A J Murphy1, G J Wilson

  • 1Centre for Exercise Science and Sport Management, Southern Cross University, Lismore, NSW, Australia.

European Journal of Applied Physiology and Occupational Physiology
|January 1, 1996
PubMed
Summary

Isometric tests poorly predict dynamic upper body performance. Differences in muscle activation patterns between isometric and dynamic movements explain this limited predictive value, suggesting caution when using isometric strength tests.

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

Time restricted feeding alters the behavioural and physiological outcomes to repeated mild traumatic brain injury in male and female rats.

Experimental neurology·2024
Same author

Timing of adjuvant chemotherapy after laparotomy for Wilms tumor and neuroblastoma.

Pediatric surgery international·2021
Same author

Malocclusions in the koala (Phascolarctos cinereus).

Australian veterinary journal·2019
Same author

Predicting badger visits to farm yards and making predictions available to farmers.

PloS one·2019
Same author

Treating cat allergy with monoclonal IgG antibodies that bind allergen and prevent IgE engagement.

Nature communications·2018
Same author

Shear-sensitive nanocapsule drug release for site-specific inhibition of occlusive thrombus formation.

Journal of thrombosis and haemostasis : JTH·2017

Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Isometric strength tests are commonly used to assess muscle function.
  • However, their relationship with dynamic performance, crucial in many sports, is not fully understood.
  • Understanding neural activation differences is key to interpreting these relationships.

Purpose of the Study:

  • To evaluate the predictive validity of isometric tests for dynamic upper body performance.
  • To compare neural activation patterns during isometric and dynamic movements.
  • To determine the influence of joint angle on isometric test outcomes.

Main Methods:

  • 24 healthy males performed isometric bench press tests at 90 and 120 degrees elbow flexion.
  • Maximal force and rate of force development were measured.

Related Experiment Videos

  • Dynamic performance was assessed using a seated medicine ball throw.
  • Electromyography (EMG) of triceps brachii and pectoralis major was recorded.

    • Main Results:

    • Isometric force and rate of force development showed poor correlations with dynamic performance (r = 0.47-0.55 for force, r = 0.08-0.31 for RFD).
    • Isometric test angle had minimal impact on predictive validity.
    • EMG analysis revealed distinct neural activation patterns between isometric tests and dynamic medicine ball throws.

    Conclusions:

    • Isometric tests have limited value in assessing dynamic upper body performance.
    • Differences in motor unit activation patterns contribute to the weak correlation between isometric and dynamic measures.
    • Relying solely on isometric strength assessments may not accurately reflect an individual's dynamic capabilities.