Jove
Visualize
Contact Us

Related Experiment Videos

Decrease in human voluntary isometric arm strength induced by simultaneous bilateral exertion.

T Ohtsuki

    Behavioural Brain Research
    |February 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    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

    Role of Multichance Fission in the Description of Fission-Fragment Mass Distributions at High Energies.

    Physical review letters·2017
    Same author

    Dielectric anomalies and interactions in the three-dimensional quadratic band touching Luttinger semimetal Pr<sub>2</sub>Ir<sub>2</sub>O<sub>7</sub>.

    Nature communications·2017
    Same author

    A novel leucine zipper motif-based hybrid peptide delivers a functional peptide cargo inside cells.

    Chemical communications (Cambridge, England)·2014
    Same author

    Structural, magnetic and electronic state characterization of L1 0-type ordered FeNi alloy extracted from a natural meteorite.

    Journal of physics. Condensed matter : an Institute of Physics journal·2014
    Same author

    Activated sludge modelling: development and potential use of a practical applications database.

    Water science and technology : a journal of the International Association on Water Pollution Research·2011
    Same author

    Role of Ti 3d carriers in mediating the ferromagnetism of Co∶TiO2 anatase thin films.

    Physical review letters·2011
    Same journal

    TAK-242 has sex-dependent effects on the acquisition of two-way active avoidance conditioning.

    Behavioural brain research·2026
    Same journal

    Fear conditioning with five footshocks is sufficient to produce stress-enhanced fear learning in rats but does not produce physiological characteristics of stress.

    Behavioural brain research·2026
    Same journal

    Behavioral characterization of bulbar sensorimotor function in a rat model of Alexander disease.

    Behavioural brain research·2026
    Same journal

    Prenatal exposure to high- but not low-molecular-weight poly(I:C) produces selective sociability deficits in offspring.

    Behavioural brain research·2026
    Same journal

    Understanding vulnerability through variability: a longitudinal twin study linking sex differences in neurodiversity, neurodevelopment and X-linked genetic mechanisms.

    Behavioural brain research·2026
    Same journal

    Hippocampal plasticity predicts behavioral lateralization and stress resilience in laying hen chicks.

    Behavioural brain research·2026
    See all related articles
    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

    Muscle strength during simultaneous bilateral arm movements is lower than unilateral movements. This reduction was more pronounced in elbow extension than flexion, with high correlation to integrated EMG findings.

    Area of Science:

    • Human physiology
    • Biomechanics
    • Neuromuscular function

    Background:

    • Understanding human voluntary muscle strength is crucial for various fields, including sports science and rehabilitation.
    • Previous research has explored factors influencing muscle strength, but the specific effects of simultaneous bilateral versus unilateral contractions require further investigation.

    Purpose of the Study:

    • To quantify the difference in maximum isometric muscle strength between simultaneous bilateral and separate unilateral elbow extension and flexion.
    • To investigate the relationship between muscle strength and integrated electromyography (EMG) during these contractions.
    • To explore potential mechanisms underlying observed strength differences.

    Main Methods:

    • Isometric maximum muscle strength measurements were taken during unilateral and simultaneous bilateral elbow extension and flexion in human participants.

    Related Experiment Videos

  • Integrated EMG was recorded to assess neuromuscular activation.
  • Statistical analysis was performed to compare strength across conditions and correlate with EMG data.

    • Main Results:

    • Simultaneous bilateral exertion of contralateral corresponding muscles resulted in reduced strength compared to unilateral exertion.
    • Strength decrease was significantly higher for extension (24.6% right, 18.8% left) than for flexion (6.3% right, 7.6% left).
    • Integrated EMG showed a comparable trend to strength, with a high correlation found between strength and integrated EMG.

    Conclusions:

    • Bilateral deficit in isometric muscle strength is evident during simultaneous contractions of corresponding contralateral muscles.
    • The observed deficit is more pronounced in extension than flexion, suggesting differential neuromuscular control mechanisms.
    • Neuromuscular activation, as indicated by integrated EMG, plays a significant role in mediating this bilateral deficit.