As someone who conducts research in this realm for a living, what study are you referring to?Fyi... Contrary to very popular belief, body joints, backs and pretty much every other body part don't wear out and break down like car parts. A long term (e.g., 30 year) study indicated lack of use, trauma (auto accident, etc.) and diet cause them to wear out and break down over time.. And by far, it's dietary issues.
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