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Related Experiment Videos

Relationship between isokinetic performance and ballistic movement.

C Bosco, P Mognoni, P Luhtanen

    European Journal of Applied Physiology and Occupational Physiology
    |January 1, 1983
    PubMed
    Summary

    This study found that peak torque in leg extensor muscles is strongly related to ballistic activities like vertical jumps and anaerobic power tests. These findings highlight the importance of muscle power in athletic performance.

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    Area of Science:

    • Sports Science
    • Biomechanics
    • Exercise Physiology

    Background:

    • Understanding the relationship between muscle strength and explosive power is crucial for athletic performance.
    • Isokinetic contractions and ballistic movements represent different aspects of muscle function.

    Purpose of the Study:

    • To investigate the correlation between leg extensor muscle mechanical behavior during ballistic activities and torque production.
    • To compare torque production during isokinetic contractions, various ballistic jumps, and a novel anaerobic power test.

    Main Methods:

    • 12 male athletes performed isokinetic contractions, static jumps (SJ), counter-movement jumps (CMJ), drop jumps (DJ), and a 60-second anaerobic jump test.
    • Peak torque was measured during isokinetic contractions at different angular velocities.

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  • Correlations were calculated between peak torque and performance in ballistic activities and anaerobic tests.

    • Main Results:

    • Peak torque showed significant positive correlations with SJ (r=0.71), CMJ (r=0.74), best DJ (r=0.60), 15s anaerobic power (r=0.70), and 60s anaerobic power (r=0.68).
    • Ballistic activities yielded higher power output compared to zero-acceleration performances.
    • The enhanced power in jumping is attributed to the coordinated contraction of three extensor muscle groups and elastic energy reuse.

    Conclusions:

    • Peak torque, particularly at specific velocities (π and 4.2 rad x s-1), is a key determinant of performance in ballistic and anaerobic power tests.
    • The study discusses the interplay of fiber type recruitment and velocity dependency in explaining the link between isokinetic and ballistic movements.