There's no blood test or body signal that reliably shows when someone is overtrained — the best way to tell is by how long it takes their performance to bounce back.
Evidence from Studies
Supporting (2)
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The study looked at overtraining in weightlifting and found that no blood test or hormone level reliably shows when someone is overtrained. Instead, the best sign is how long it takes their performance to bounce back.
Overtraining Syndrome as a Risk Factor for Bone Stress Injuries among Paralympic Athletes
The study says doctors can’t rely on blood tests or hormones to diagnose overtraining, which matches the claim that recovery time is more important for diagnosis.
Contradicting (2)
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Diagnosing Overtraining Syndrome: A Scoping Review
The study found that certain body signals like hormones and heart patterns can help diagnose overtraining when used together, which goes against the idea that no such reliable signs exist.
The claim says we can’t use body markers to diagnose overtraining and should instead wait to see how long it takes athletes to recover. But this study found a set of blood and hormone tests that can diagnose overtraining perfectly, which goes against that idea.
Gold Standard Evidence Needed
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