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

The instantaneous torque-angular velocity relation in plantar flexion during jumping.

G J van Ingen Schenau, M F Bobbert, P A Huijing

    Medicine and Science in Sports and Exercise
    |August 1, 1985
    PubMed
    Summary

    Jumping experiments reveal that the ankle joint

    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

    Adaptation of physiological cross-sectional area and serial number of sarcomeres after tendon transfer of rat muscle.

    Scandinavian journal of medicine & science in sports·2015
    Same author

    Stimulation level-dependent length-force and architectural characteristics of rat gastrocnemius muscle.

    Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology·2010
    Same author

    Stimulation frequency history alters length-force characteristics of fully recruited rat muscle.

    Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology·2010
    Same author

    On the effectiveness of force application in guided leg movements.

    Journal of motor behavior·2009
    Same author

    Running biomechanics: shorter heels, better economy.

    The Journal of experimental biology·2008
    Same author

    Clinical and molecular overlap between myopathies and inherited connective tissue diseases.

    Neuromuscular disorders : NMD·2008

    Area of Science:

    • Biomechanics
    • Human Movement Analysis
    • Sports Science

    Background:

    • Understanding muscle function during complex movements is crucial.
    • The torque-velocity relationship is well-established for isolated muscles but less understood in dynamic activities.

    Purpose of the Study:

    • To investigate the instantaneous torque-angular velocity relationship of the ankle joint during maximal vertical jumps.
    • To compare this relationship to the known hyperbolic force-velocity curve for isolated muscles.

    Main Methods:

    • Measured ankle joint torques, angular velocities, and power outputs during maximal vertical jumps.
    • Utilized ground reaction force measurements and film analyses.
    • Involved twelve trained subjects performing jumps from a semi-squatting position.

    Related Experiment Videos

    Main Results:

    • The instantaneous torque-angular velocity relationship in jumping differed from the hyperbolic curve of isolated muscles.
    • Maximal power output (2499 W) occurred at 60% of maximal torque and 80% of maximal angular velocity.
    • Maximal power output was significantly higher (sixfold) than reported for isokinetic plantar flexions.

    Conclusions:

    • The torque-velocity relationship in complex movements like jumping is distinct from isolated muscle contractions.
    • Energy storage in series elastic components and energy transfer by polyarticular muscles likely influence ankle joint power.
    • Further research is needed to link intrinsic muscle properties to performance in polyarticular movements.