Luigi Mangione had spondylolisthesis, a lower back condition. He wrote about painful symptoms like sciatica on Reddit.

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Luigi Mangione led from the Blair County Courthouse after an extradition hearing in Hollidaysburg, Pennsylvania.
Luigi Mangione led from the Blair County Courthouse after an extradition hearing in Hollidaysburg, Pennsylvania.

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Your back and neck pain might have nothing to do with your bad posture, a posture historian says

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people in military attire stand at attention in front of a drill sargeant
If you have a drill sergeant in your head telling you to correct your posture all the time, you can tell them to chill out.

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