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Unstable? Unreliable 

Paul Ingraham ARCHIVEDMicroblog posts are archived and rarely updated. In contrast, most long-form articles on PainScience.com are updated regularly over the years.

You can’t very well treat core instability if you can’t diagnose it as a problem in the first place. This test of the reliability of core strength testing was a clear failure: “6 clinical core stability tests are not reliable when a 4-point visual scoring assessment is used.” Even if core strength is important (a separate question), this evidence clearly shows that no one should be claiming to be able to detect a problem with core weakness in the first place. A bit problematic for core dogma.

Just added this citation to my article about reliability studies—it's a really good example of poor reliability. Later I will add it to a half dozen more articles.

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