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DOMS-associated changes in ankle and knee joint dynamics during running.

Darren J Dutto1, William A Braun

  • 1Department of Kinesiology and Health Promotion, Human Performance Laboratory, California State Polytechnic University, Pomona, CA 91768, USA. ddutto@csupomona.edu

Medicine and Science in Sports and Exercise
|April 6, 2004
PubMed
Summary

Delayed onset muscle soreness (DOMS) alters running mechanics. Knee stiffness increases during initial stance, raising vertical leg stiffness, potentially protecting muscles.

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Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Sports Medicine

Background:

  • Delayed onset muscle soreness (DOMS) is a common consequence of strenuous exercise.
  • Understanding how DOMS affects running biomechanics is crucial for injury prevention and performance optimization.

Purpose of the Study:

  • To investigate changes in leg mechanics, specifically ankle and knee joint kinematics and stiffness, in response to DOMS.
  • To examine the impact of a downhill run on these biomechanical variables.

Main Methods:

  • Nine well-trained male runners underwent kinematic analysis using high-speed video before and 48 hours after a 30-minute downhill run.
  • Key variables measured included ankle and knee range of motion (ROM), peak angular velocity, joint stiffness, and leg vertical stiffness.

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  • Statistical analysis involved a repeated measures ANOVA to compare pre- and post-DOMS data.

    • Main Results:

    • A decrease in both knee and ankle range of motion (ROM) was observed with DOMS.
    • Knee stiffness showed an initial increase during early stance, followed by a decrease.
    • These alterations in knee stiffness led to an increased vertical leg stiffness during the initial stance phase.

    Conclusions:

    • DOMS modifies knee mechanics, notably increasing initial stance stiffness and consequently vertical leg stiffness.
    • This altered knee stiffness may function as a protective response to mitigate pain or further damage in the knee extensor muscles.