Written by Kento Kamiyama PT, DPT
Ober’s Test is a well known Orthopedic test learned in Physical Therapy school. The post today is to expand about the Ober’s Test and the other implications it has besides testing IT Band “tightness”.
While I was going through physical therapy school, IT band pain was a common thing we heard or saw. IT Band syndrome seems to be common for runners and commonly presented with lateral hip pain or lateral knee pain. To diagnose an IT Band dysfunction it was common to perform the following tests:
– Obers Test,
– Noble Compression Tests,
– Prone Lying Tests for Ilitiotibal Band Contracture
In PT school, I was taught Obers test assesses the tensor fascia latae or Iliotibial band contracture.
According to MgGee et al (2008), this is how the test is done and described:
Ober’s test assesses the tensor fasciae latae (Iliotibial band) for contracture. The patient is in the side lying position with the lower leg flexed at the hip and knee for stability. The examiner then passively abducts and extends the patient’s upper leg with the knee straight or flexed to 90 degrees. The examiner slowly lowers the upper limb; if a contracture is present, the leg remains abducted and does not fall to the table. When doing this test, it is important to extend the hip slightly so that the iliotibial band passes over the greater trochanter of the femur. To do this, the examiner stabilizes the pelvis at the same time to stop the pelvis from “falling backward”. Ober origninally described the test with the knee flexed. However, the iliotibial band has a greater stretch placed on it when the knee is extended…
Ooo I got that IT Band Syndrome
Here is a youtube video describing the test:
As stated above and in the video, when the test is positive we assume that the TFL and the IT Band is “tight” and the treatment protocol is to ‘stretch’ or perform manual therapy to the IT Band (that is at least how we learned it in school). However, research show that changing the IT Band through manual therapy is next to impossible. According to Chaudhry et al. (2008) to change the IT Band length by 1% it’ll take 925 kg/~2 tons worth of force!!! Hence, there is little chance that you can actually deform the IT Band and make the IT Band less “tight”.
This poses the question, is the IT Band really tight when you have a positive Ober’s Test? Maybe….maybe not. As I am studying Postural Restoration Institute’s theories/assessment and treatments, I found an interesting article that described about the Ober’s test.
According to Tenney et al. (2013), the Ober’s test was developed by Orthopedic surgeon Frank R. Ober in 1937 to assess passive hip-adduction ROM in patients with LUMBOPELVIC pain.
Furthermore, when Dr. Ober surgically excised the iliotibial band (ITB) in patients with back pain, passive adduction improved, lordotic curvature of the lumbar spine decreased, and lumbopelvic and sciatic pain was decreased. This was the traditional application of the Ober’s test until in 1949 Kendall used Ober’s test as a way to determine whether the ITB and/or tensor fasciae late (TFL) needs stretching. It seems like Kendall took away that it was an assessment of the lumbopelvic region. Maybe there was a lost in translation occurring there?
Since then the Obers test has been used primarily for IT Band “tightness”. Now, the question becomes if a Ober’s Test is positive, do we work on the IT Band in hopes to decrease the “tightness” or can we work on the lumbopelvic region to improve the Ober’s test pre and post treatment? Since lumbopelvic pain conditions have been associated with decreased passive Hip ROM and increased lumbar lordosis, working on the lumbar region theoretically make sense (Boyle et 2005, Boyle et al 2011, Boyle 2003).
According to the study from Tenney et al (2013), improving pelvic position does improve Ober’s test. In his research article, they activate the abdominals and hamstring muscles to subjects who experience lumbo pelvic pain and a positive Ober’s test. Their intervention was one of the classic 90-90 hip lift with balloon exercises from PRI. You can find the article here.
The results of pre and post testing is quite significant when implemented correctly. According to the authors of the article, an Ober’s test can be positive in a lumbopelvic patient for the following reasons:
When the tested leg is brought into neutral hip extension and then adducted, the neck of the femur may impinge on the cotyloid rim
of the acetabulum IF the pelvis is in a state of anterior tilt in the sagittal plane and in a forward rotation in the transverse plane.
Hence, by improving the pelvis positioning, the bony block is removed and the hip can be adducted better.
If you experienced many Obers Tests that were positives, try implementing the exercises in the article or take a PRI course to learn further. If assessed well and implemented the exercises in the right setting, you may be surprised how often the Ober’s test improves.
Maybe your IT Band Syndrome is really not because of a tight IT Band. It could be because you have poor abdominal and hamstring strength. Get assessed 🙂
Boyle KL. Managing a female patient with left low back pain and sacroiliac joint pain with therapeutic exercise: a case report. Physi- other Can. 2011;63(2):154–63. http://dx.doi.org/10.3138/ptc.2009- 37. Medline:22379254
Boyle K, Jansa S, Lauseng C, et al. Management of a woman diag- nosed with trochanteric bursitis with the use of a Protonics neuro- muscular system. J Section Women’s Health. 2003;27(1):12–7.
Ober FR. The role of the iliotibial band and fascia lata as a factor in the causation of low-back disabilities and sciatica. J Bone Joint Surg Am. 1935; 18(1): 105-110.
Teyle K. Management of a female with low back pain and sacroiliac joint pain with myokinematic restoration: a case repot. [abstract]. J Orthop Sport Phys. 2005;35(1):A51