For this test, you must measure limb length of both the involved and uninvolved side. The patient will lie supine on table. Use tape measure in cm, start at ASIS and measure to medial malleolus of both the involved and the uninvolved limb.
Instruct the patient to stand on the uninvolved leg with opposite leg lightly touching ground behind for balance. The patient will push the target indicator with toes, maintaining contact the entire time, then will return to starting position without losing balance. The patient must not place foot on top of target indicator to allow shifting weight for balance or kick target indicator. The patient will perform 3 repetitions on the noninvolved, followed by 3 repetitions on involved in the following directions: anterior, posterolateral, posteromedial.
Measure score in 0.5 cm increments and take the average of the 3 trials and report one score for each direction. A composite score is determined by taking the average of the 3 trials and diving it by three times the limb length, multiplied by 100%. A score of 94% is passing.*
*Plisky P, Rauh M, Kaminski T, Underwood F. (2006) Star Excursion Balance Test as a Predictor of Lower Extremity Injury in High School Basketball Players. Journal of Orthopaedic & Sports Physical Therapy. 36 (12): 911-919