Ligament injuries of the knee, particularly the anterior cruciate ligament (ACL), represent a significant percentage of lower extremity injuries during athletic participation. One possible factor associate with the high percentage of knee ligament injuries is a decrease in proprioception associated with fatigue. Previous research has found a decrease in proprioception following maximal fatigue of the knee musculature and following low intensity work to maximum fatigue. To date no investigation has examined if incremental increases in fatigue have an effect on proprioception. Therefore, the purpose of this study was to examine the effect of increasing levels of fatigue on active joint reposition sense (AJRS) of the knee.



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