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

Why does knee extensor muscles torque decrease after eccentric-type exercise?

V Martin1, G Y Millet, G Lattier

  • 1INSERM/ERIT-M 0207 Motricité-Plasticité Faculté des Sciences du Sport, Université de Bourgogne, Dijon, France. Vincent.Martin@u-bourgogne.fr

The Journal of Sports Medicine and Physical Fitness
|December 16, 2005
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

Supporting long-term engagement in HIV clinical care: Learning from the COVID-19 pandemic.

HIV medicine·2025
Same author

Magnetic-Induced Force Noise in LISA Pathfinder Free-Falling Test Masses.

Physical review letters·2025
Same author

Are Maximal Power and Maximal Aerobic Capacity in Older and Very Old Adults Dependent on their Level of Physical Activity?

The journals of gerontology. Series A, Biological sciences and medical sciences·2025
Same author

[Screening for sleep disorders in internal medicine as potential comorbidities of systemic autoimmune diseases and improving patients' quality of life].

La Revue de medecine interne·2024
Same author

Design, justification, and prototyping of the visible and infrared wide angle viewing system diagnostic for ITER equatorial port 12.

The Review of scientific instruments·2024
Same author

[Characteristics of radiotherapy for adolescents and young adults].

Cancer radiotherapie : journal de la Societe francaise de radiotherapie oncologique·2024
Same journal

A critical commentary on CrossFit Research® with coach insights on training monitoring and physical assessment.

The Journal of sports medicine and physical fitness·2026
Same journal

Age-related differences during stop-ball small-sided games in youth soccer.

The Journal of sports medicine and physical fitness·2026
Same journal

Dynamic multi and single joint strength and vertical jump performance in amateur athletes who have returned to sport following anterior cruciate ligament reconstruction.

The Journal of sports medicine and physical fitness·2026
Same journal

Fluid loss during tennis matches is associated with reduced muscle strength in sport-specific limbs.

The Journal of sports medicine and physical fitness·2026
Same journal

Implementing ECG screening in Florida (USA): a wishful thinking or a valid opportunity?

The Journal of sports medicine and physical fitness·2026
Same journal

The ACC opposition to legislative ECG screening mandates for competitive athletes.

The Journal of sports medicine and physical fitness·2026
See all related articles

Eccentric exercise causes significant knee extensor muscle fatigue, with most of the strength loss attributed to low-frequency fatigue and potential contractile failure, though central factors also contribute.

Area of Science:

  • Exercise Physiology
  • Neuromuscular Physiology
  • Sports Science

Background:

  • Neuromuscular fatigue is a complex phenomenon with both central and peripheral origins.
  • Eccentric exercise, characterized by muscle lengthening under tension, is known to induce significant muscle damage and fatigue.

Purpose of the Study:

  • To investigate the central and peripheral contributions to neuromuscular fatigue in knee extensors after strenuous eccentric exercise.
  • To differentiate the origins of force reduction using voluntary and evoked contractions alongside electromyographic (EMG) analysis.

Main Methods:

  • Ten male subjects performed 15 minutes of intermittent downhill running.
  • Maximal voluntary contractions (MVC) and percutaneous electrical stimulations were used to assess knee extensor function before and after exercise.

Related Experiment Videos

  • Electromyography (EMG) of vastus lateralis, vastus medialis, and biceps femoris was recorded, along with M-wave characteristics.

    • Main Results:

    • A significant decrease in maximal voluntary contraction (MVC) force and voluntary activation (%VA) was observed.
    • Peak tetanus tension at 20 Hz and 80 Hz declined, indicating impaired muscle contractility.
    • The ratio of P20 to P80 decreased, suggesting the presence of low-frequency fatigue.

    Conclusions:

    • A portion of the MVC decrement is attributable to central fatigue mechanisms.
    • The majority of the force loss is linked to peripheral factors, specifically low-frequency fatigue.
    • Contractile failure within the muscle fibers cannot be ruled out as a contributing factor to the observed fatigue.