Lower Extremity EMG in Male and Female College Soccer Players during Single-Leg Landing

in Journal of Sport Rehabilitation
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Context:

Gender differences in muscle activity during landing have been studied as a possible contributing factor to the greater incidence of anterior cruciate ligament injuries in women.

Objective:

To compare root-mean-square (RMS) electromyography (EMG) of selected lower extremity muscles at initial contact (IC) and at peak knee internal-rotation (IR) moment in men and women during landing.

Design:

Preexperimental design static-group comparison.

Setting:

Motion-analysis laboratory.

Participants:

16 varsity college soccer players (8 men, 8 women).

Main Outcome Measures:

EMG activity of the gluteus medius, lateral hamstrings, vastus lateralis, and rectus femoris during landing.

Results:

When RMS EMG of all muscles was considered simultaneously, no significant differences were detected between genders at IC or at peak knee IR moment.

Conclusion:

Male and female college soccer players display similar relative muscle activities of the lower extremity during landing. Gender landing-control parameters might vary depending on the technique used to analyze muscle activity.

Garrison, Hart, and Ingersoll are with the Dept of Kinesiology, University of Virginia, Charlottesville, VA 22904-4407. Palmieri is with the Dept of Kinesiology, University of Michigan, Ann Arbor, MI 48109-2214. Kerrigan is with the Dept of Physical Medicine and Rehabilitation, University of Virginia, Charlottesville, VA 22908.