The Effects of Eversion Fatigue on Frontal Plane Joint Position Sense in the Ankle

in Journal of Sport Rehabilitation
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There is limited information on fatigue of the evertors on frontal plane joint position sense (JPS).


To examine the effects of isokinetic concentric-eccentric fatigue of the evertors on frontal plane JPS of the ankle.


A 2 × 4 factorial design.


Research Laboratory.

Patients or Other Participants:

40 male and female healthy subjects.


JPS was tested at 10° and 20° of inversion and 5° and 10° 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.


Main effect for condition and angle were significant with pre/post fatigue. There were overestimation of angles postfatigue with AE greater at 20° of inversion (P = .003), followed by 10° of inversion (P < .001), 10° of eversion (P = .005), and 5° of eversion (P = .005).


When the ankle evertors were fatigued, the AE for JPS was significantly higher at all test angles.

Michelle Sandrey is with the School of Physical Education at West Virginia University in Morgantown. E-mail: Timothy Kent is with Texas Lutheran University, Department of Kinesiology in Seguin, TX.