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@killyourfm it was the only thing that worked for me, when my lower back began stiffening and hurting so badly it took me a minute to stand all the way erect when getting out of an office chair, close to ten years ago now.

Turned out, it wasn't my back at all. It was my TFLs (a stringy muscle running down the outside of the thigh) refusing to release, which my erectors had to fight--and TFLs are bigger and stronger than erectors, so.

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