Modified Thomas Test for Hip Flexor
The modified Thomas test allows the clinician to assess four different muscles prone to tightness namely, the one-joint hip flexor, iliacus and psoas major, and the two-joint hip flexors, rectus femoris and TFL-ITB. Tightness of the hip flexors limits hip hyperextension in gait and may cause an anterior pelvic tilt. Weakness ofthe gluteus maximus often is due to facilitation of the hip flexors.