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NPR

A discovery in the muscles of long COVID patients may explain exercise troubles

Long COVID patients can experience severe energy crashes after physical exertion. New research provides clear evidence that there's a biolog

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Quote:

By taking biopsies from long COVID patients before and after exercising, scientists in the Netherlands constructed a startling picture of widespread abnormalities in muscle tissue that may explain this severe reaction to physical activity.

Among the most striking findings were clear signs that the cellular power plants, the mitochondria, are compromised and the tissue starved for energy.

"We saw this immediately and it's very profound," says Braeden Charlton, one of the study's authors at Vrije University in Amsterdam.

The tissue samples from long COVID patients also revealed severe muscle damage, a disturbed immune response, and a buildup of microclots.

"This is a very real disease," says Charlton. "We see this at basically every parameter that we measure."