Lower Crossed Syndrome Type A vs. Type B: What’s the difference?

by Dr. Phil on January 23, 2012

I recently¬†received a question about the difference between Janda’s Type A Lower Crossed Syndrome and Type B Lower Crossed Syndrome. Janda talked about his Lower Crossed Syndrome have 2 different presentations in patients; one manifested in the lower back (Type B) and the other in the hip (Type A).

Janda's Lower Crossed Syndrome Type A

Janda's Lower Crossed Syndrome Type A

Janda Lower Crossed Syndrome Type B

Janda Lower Crossed Syndrome Type B

 According to Assessment and Treatment of Muscle Imbalance: The Janda Approach co-author Robert Lardner PT:

The two types are similar and display the same main muscle imbalance characteristics. However, Type B is due to primarily weakness and length of the abdominal wall giving a shallower, longer lordosis (when compared to Type A) which extends into the thoracolumbar area, with a more cranial shift of the kyphosis, anterior pelvic tilt, and genu recurvatum. While Type A is chiefly due to the shortness of the hip flexors leading to a deeper, shorter lordosis (when compared to Type B), it does not extend into the thoracolumbar region and is confined to the lumbar spine with chronic shortening of the hip flexors leading to knee flexion.

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