Ober Test

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 Ober Test

What is Ober test?

The Ober Test is used to test for iliotibial band syndrome (Tight ITB) or for tensor fascia latae (TFL) muscle contraction or inflammation.

See Also: Thomas Test

How do you do the Ober’s test?

What does a positive Ober test mean?

Ober test is considered positive or negative in these conditions:

Modified Ober Test

The modified Ober test is performed in the same fashion as the Ober test except that the knee of the tested leg is extended.

Modified Ober Test
Modified Obers Test

Ober & Modified Obers Test Accuracy

There are No studies support the accuracy of the Obers test for measuring iliotibial band tightness.

A study by Reese and Bandy was performed to determine the intrarater reliability of the Ober test and the modified Ober test for the assessment of IT band flexibility using an inclinometer to measure the hip adduction angle and to determine if a difference existed between the measurements of IT band flexibility between the Ober and the modified Ober test.

This study concluded that the use of an inclinometer to measure hip adduction using both the Ober test and the modified Ober test appears to be a reliable method for the measurement of IT band flexibility, and the technique is quite easy to use.

However, given that the modified Ober test allows significantly greater hip adduction ROM than the Ober test, the two examination procedures should not be used interchangeably as a measurement of IT band flexibility.


Related Anatomy:

 Tensor fasciae latae (tensor fasciae femoris):

Iliotibial Band:

The iliotibial band is a thickening of fascia that runs over the lateral side of the femur, it’s also known as Maissiat’s band.

Proximally, it originates from the deep fascia of the thigh, gluteus maximus, and tensor fascia lata (TFL).

Distally it inserts on Gerdy’s tubercle on the proximal/lateral tibia. Proximal ITB function includes:

  1. Hip extension
  2. Hip abduction
  3. Lateral hip rotation.

ITB function depends on the position of the knee joint:

Iliotibial Band Anatomy
iliotibial band Anatomy


  1. Campbel’s Operative Orthopaedics 13th Edition Book
  2. Clinical Tests for the Musculoskeletal System 3rd Ed. Book
  3. Willett, Gilbert M.; Keim, Sarah A.; Shostrom, Valerie K.; Lomneth, Carol S. (11 January 2016). “An Anatomic Investigation of the Ober Test”. The American Journal of Sports Medicine. 44 (3): 696–701.
  4. Ober, F. R. (1936). “The role of the iliotibial band and fascia lata as a factor in the causation of low-back disabilities and sciatica”. Journal of Bone and Joint Surgery. 18: 105–110.
  5. Scott Hyland; Steven Graefe; Matthew Varacallo: Anatomy, Bony Pelvis and Lower Limb, Iliotibial Band (Tract)
  6. Reese NB, Bandy WD. Use of an inclinometer to measure flexibility of the iliotibial band using the Ober test and the modified Ober test: differences in magnitude and reliability of measurements. J Orthop Sports Phys Ther. 2003 Jun;33(6):326-30. doi: 10.2519/jospt.2003.33.6.326. PMID: 12839207.

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