The pull of a tight psoas. It is impossible to have a problem with the psoas that does not involve the aforementioned piriformis. Any problem with its next door neighbor quadratus lumborum will involve the psoas as well.
The pull of a tight psoas. It is impossible to have a problem with the psoas that does not involve the aforementioned piriformis. Any problem with its next door neighbor quadratus lumborum will involve the psoas as well.
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