The post rehab and/or corrective exercise assessment of the lower extremity commonly includes the the Thomas test. The Thomas test is often illustrated and demonstated incorrectly with the pelvis positioned far back on the surface supporting the client. The test should be performed with the ischial tubs placed on the edge of the surface supporting the client but the tubs are fully supported. The error in placement of the pelvis will cause inaccurate test findings. Please watch my demonstration of the Thomas test by clicking the link below.