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Related Experiment Videos

Quadriceps function and training after knee ligament surgery

G Grimby, E Gustafsson, L Peterson

    Medicine and Science in Sports and Exercise
    |January 1, 1980
    PubMed
    Summary

    This study on knee ligament injuries found that isokinetic training significantly improved muscle strength more than weight training or self-training. Even with activity, operated knees showed reduced torque, highlighting the need for specific rehabilitation.

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    Area of Science:

    • Orthopedics
    • Sports Medicine
    • Rehabilitation Science

    Background:

    • Knee ligament injuries often lead to reduced muscle strength and torque in operated limbs.
    • Post-operative rehabilitation aims to restore function, but optimal training methods require investigation.

    Purpose of the Study:

    • To compare the effectiveness of isokinetic training, weight training, and self-training on muscle strength recovery after knee ligament surgery.
    • To assess changes in muscle fiber size and biochemical markers following different training regimens.

    Main Methods:

    • A follow-up study involving 30 patients post-knee ligament surgery.
    • Measurements included maximal isometric and isokinetic knee extension torque at various angular velocities.
    • Muscle biopsies from the vastus lateralis were analyzed for fiber area and biochemical content.

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    Main Results:

    • Operated limbs exhibited reduced maximal torque despite resumed physical activity and training.
    • All training groups showed strength increases, with isokinetic training yielding the largest gains.
    • Muscle fiber areas, particularly type II, showed a tendency to increase post-training, though not significantly.

    Conclusions:

    • Isokinetic training demonstrates superior efficacy in enhancing muscle strength post-knee ligament surgery compared to weight training or self-training.
    • The ability of isokinetic training to achieve maximal torque across the full range of motion may explain its greater effectiveness.
    • While muscle fiber size may improve, biochemical markers of muscle function did not significantly change with training in this cohort.