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Quadriceps strength training using two forms of bilateral exercise.

S G Gerberich1, D Erickson, R Serfass

  • 1School of Public Health, University of Minnesota, Minneapolis.

Archives of Physical Medicine and Rehabilitation
|October 1, 1989
PubMed
Summary
This summary is machine-generated.

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Quadriceps strength training showed significant gains compared to no exercise, but not between concentric-only and concentric-eccentric methods. Unequal strength increases between legs warrant further biomechanical investigation.

Area of Science:

  • Exercise Physiology
  • Biomechanics
  • Sports Medicine

Background:

  • Quadriceps strength is crucial for lower limb function.
  • Understanding the impact of different resistance training modalities on muscle strength is essential for optimizing exercise protocols.
  • Previous research suggests a link between eccentric exercise and transient knee pain.

Purpose of the Study:

  • To compare the effectiveness of concentric-only quadriceps strength training versus combined concentric-eccentric training.
  • To evaluate the impact of different exercise equipment on strength development.
  • To investigate potential disparities in strength gains between limbs during bilateral training.

Main Methods:

  • 10-week randomized controlled study with three groups: concentric-only resistance, concentric-eccentric resistance, and non-exercise control.

Related Experiment Videos

  • Utilized bilateral computerized exercise equipment for resistance training.
  • Employed univariate and multivariate statistical analyses to assess strength changes.

    • Main Results:

    • No significant strength differences were found between the two experimental exercise groups.
    • Both exercise groups demonstrated significant strength increases compared to the non-exercise group, but only in the right leg.
    • Two participants in the concentric-eccentric group experienced transient knee pain, leading to their withdrawal.

    Conclusions:

    • Concentric-only and concentric-eccentric resistance training may yield similar strength improvements.
    • Bilateral strength training may result in asymmetrical strength development between limbs.
    • Eccentric exercise may be associated with an increased risk of transient knee pain, necessitating further research into underlying mechanisms.