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On an Anterior Pelvic Tilt and it’s Effects on IR and ER…I have just read your aticle on postural asymmetry and cycling. I find that many articles contradict each other (i.e. some say anterior pelvic tilt causes lateral rotation of the femur others say medial). Anyway could you kindly explain a little further which mucles (left or right) are short or long (i.e. the latissimus on the left or right is tight)? When the pelvis is anteriorly rotated on the left (a Left AIC pattern), the femur can actually go into internal or external rotation depending on how the person compensates for this pattern. Once the pelvis goes forward, the femur will orient inward, however, compensation for this inwardly oriented femur can result in the person now actively externally rotating. In other words, we see both internal and external rotation. You will see a long or short leg depending on the position of the pelvis and the integrity of the ligaments. Because of the position of the thorax in left trunk rotation (a Right BC pattern), the right latissimus is most often tight. In this pattern, the right latissimus will work as an internal rotator instead of the subscapularis, pulling your entire shoulder girdle forward on the right. It also works as an extensor of the back, stabilizing your spine every time you pick your left leg up. This happens often because you spend the majority of your time on your right lower extremity.
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