Since this muscle is a hip flexor we will test its extensibility during a passive hip extension. To properly execute the test, the tested leg (on the table) is extended at the knee so that the rectus femoris (which is also a hip flexor and knee extensor) will be shortened and thus will have less effect on the results of the test.

Test: The subject is on his back and slowly pulls on the non-test leg (if you test for the right psoas you pull on the left leg) to bring it towards him and induce a flexion that will lead to a relative extension of the tested leg (Thomas test).

Results: If the extensibility of the psoas is normal the tested leg will stay on the table when the subject brings the other leg towards him.

If the tested leg lifts off the table we have a hypo-extensibility. To test for a hyperextensibility perform the same test but with the tested leg hanging off of the table's end, if it points down (lower than the table) when you bring the leg towards you, you have hyper-extensibility.

Careful! You can have a false positive result in this test. If the lower back leaves the table (if lordosis increases) it can give you a false hypo-extensibility result. The lower back must remain flat on the table at all times. To do so, the non-tested leg should only be lifted up to a point where a flat back can be maintained.

Turbo Charged Fitness With The Tabata System

Turbo Charged Fitness With The Tabata System

The Tabata workout system is a version of the High Intensity Interval Training program developed by Professor Izumi Tabata as training for Olympic speed skaters in 1996. The results studies conducted on the training program confirm that even a four minute cardiovascular exercise routine improves a persons level of fitness.

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