Context: There is limited information on fatigue of the evertors on frontal plane joint position sense (JPS).
Objective: To examine the effects of isokinetic concentric-eccentric fatigue of the evertors on frontal plane JPS of the ankle.
Design: A2 x 4 factorial design.
Setting: Research Laboratory.
Patients or other participants: 40 male and female healthy subjects.
Interventions: JPS was tested at 10 degrees and 20 degrees of inversion and 5 degrees and 10 degrees of eversion in a nonfatigued/fatigued condition. After fatigue of evertors was determined on an isokinetic device, post fatigue testing of JPS occurred.
Main outcome measures: JPS absolute error (AE) for inversion and eversion.
Results: Main effect for condition and angle were significant with pre/post fatigue. There were overestimation of angles postfatigue with AE greater at 20 degrees of inversion (P = .003), followed by 10 degrees of inversion (P < .001), 10 degrees of eversion (P = .005), and 5 degrees of eversion (P = .005).
Conclusion: When the ankle evertors were fatigued, the AE for JPS was significantly higher at all test angles.