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Lie supine on bench with leg extended beyond edge of bench (less than half of thigh on bench). Bring knee of other leg to chest.


Pull thigh down with hands until low back touches testing surface. Repeat on opposite leg.


Lower thigh should remain on table. If lower thigh lifts off table while low back contacts table, a tight Iliopsoas is indicated.


Thigh should be pulled into chest just enough to have low back contact bench. A false positive may occur if pelvis posteriorly rotate beyond what is nessecary to have low back contact testing surface.

Thomas Test


Joint ROM: Hip Extension
Flexibility: Iliopsoas
Force: Passive (Gravity)

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