Long COVID Atlas
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Plain-language first, with specialist detail below. For understanding, not medical advice.

Long COVID Atlas › Glossary › Mitochondria

Physiology

Mitochondria

https://longcovidatlas.org/glossary/mitochondria

In plain language

What it is

The tiny structures inside cells that turn fuel into usable energy.

Why it matters

When they work poorly, the same effort produces fatigue and slow recovery.

Think of it like

The cell's power plants, running below capacity.

When the cell's batteries run low mitochondria: the cell's power plants less usable energy (ATP) fatigue, lowstamina, slowrecovery
Inside every cell, mitochondria turn fuel into usable energy. In long COVID the muscle studies show these power plants working less efficiently and the muscle leaning on a lower-yield backup process. Less energy produced, for the same effort, is felt as fatigue, poor stamina, and slow recovery, and it worsens after exertion.

For specialists

Formal definition

Organelles performing oxidative phosphorylation; long COVID muscle shows reduced oxidative capacity and a glycolytic shift.

Mechanism

Lower mitochondrial efficiency and a fiber-type shift reduce exercise capacity and worsen after exertion.

Sources

Related terms

Post-exertional malaise