"Revealed: The Physical Cause of Long-COVID Fatigue"

Researchers have found that persistent fatigue in long-COVID patients is linked to reduced energy production in muscle cell mitochondria, rather than residual coronavirus presence or heart and lung issues. The study suggests a biological basis for long-COVID fatigue and recommends tailored treatments and light exercise for patients, as exertion can worsen symptoms. This discovery provides a potential direction for targeted therapies and sheds light on the physical causes of long-COVID symptoms.