Frontal-plane tibiofemoral landing angle, excursion, and vGRF during landing from a drop jump under prefatigue, postfatigue, and recovery conditions.
After the fatigue protocol, participants landed in a greater valgus orientation than in the prefatigued state. No differences in frontal-plane excursion or vGRF were noted.
Isolated bilateral hip-abductor fatigue alters frontal-plane lower extremity orientation during a double-leg landing. Because an increase in valgus orientation has been observed at or near the time of noncontact anterior cruciate ligament injuries, we recommend improving hip-abductor muscle performance to lessen the risk of such injuries.
Carcia is with the Dept of Physical Therapy, Duquesne University, Pittsburgh, PA 15282. Eggen is with the Athletics Dept, California Polytechnic State University, San Luis Obispo, CA 93407. Shultz is with the Dept of Exercise and Sport Science, University of North Carolina at Greensboro, Greensboro, NC 27402.