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

Fatigue-induced changes in phasic muscle activation patterns during dynamic trunk extension exercise.

Brian C Clark, Todd M Manini, Lori L Ploutz-Snyder

    American Journal of Physical Medicine & Rehabilitation
    |February 17, 2007
    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

    Limb Disuse Trials in Humans: Key Insights on Study Design, Ethics, and Project Execution.

    Exercise and sport sciences reviews·2026
    Same author

    A High-Fat/High-Sugar Diet Is Associated with Reduced Motor Unit Number and Neuromuscular Dysfunction in Late-Middle-Aged Female Rats: A Pilot Study.

    Life (Basel, Switzerland)·2026
    Same author

    Functional stratification reveals speed-independent gait impairments beyond chronological age.

    Clinical biomechanics (Bristol, Avon)·2026
    Same author

    Mobility Function and Aperiodic Electrocortical Activity in Younger and Older Adults.

    IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society·2026
    Same author

    Sex differences in lower limb muscle atrophy during simulated microgravity exposure: implications for exploration spaceflight.

    Journal of applied physiology (Bethesda, Md. : 1985)·2026
    Same author

    Associations between declines in uneven terrain walking speed and visuospatial working memory in older adults.

    Frontiers in aging neuroscience·2026

    Fatigue alters muscle activation during trunk extension exercises. Hip extensors show increased recruitment in the extension phase when fatigued, while lumbar extensors remain consistent. Exercise protocols influence targeted muscle stimulation.

    Area of Science:

    • Biomechanics
    • Exercise Physiology
    • Muscle Physiology

    Background:

    • Understanding muscle activation patterns during dynamic exercises is crucial for effective training.
    • Fatigue is known to alter neuromuscular control, potentially impacting exercise efficacy and injury risk.

    Purpose of the Study:

    • To investigate how fatigue influences the phasic muscle-activation patterns of key extensor muscles during dynamic trunk extension exercise.
    • To determine if lumbar extensors, gluteus maximus, or biceps femoris activation patterns change with fatigue.

    Main Methods:

    • Fifteen healthy volunteers performed dynamic trunk extension to task failure at 50% maximum intensity.
    • Electromyography (EMG) recorded muscle activity from lumbar extensors, gluteus maximus, and biceps femoris.

    Related Experiment Videos

  • EMG data analyzed in 10-degree increments across extension and flexion phases in unfatigued and fatigued states.

    • Main Results:

    • Lumbar extensor EMG remained consistent regardless of range-of-motion or fatigue.
    • Gluteus maximus demonstrated altered activation with fatigue, showing increased recruitment during the extension phase.
    • Biceps femoris showed a consistent pattern of higher activation in the extension phase, both fatigued and unfatigued.

    Conclusions:

    • Dynamic trunk extension exercise increases hip extensor activity during the extension phase, while lumbar extensor activity remains stable.
    • Fatigue leads to altered muscle recruitment, with a greater reliance on hip extensors during the extension phase.
    • Prone trunk extension can target both lumbar and hip extensors, with specific protocols influencing primary muscle activation.