How a Muscle Contracts · Muscles
A single fibre has no volume dial — it fires fully or not at all.
An individual muscle fibre cannot contract gently. Stimulate it enough and it gives everything it has; stimulate it less and it does nothing at all. There is no half-effort at the level of one fibre.
There's more: a single fibre has no volume dial — it fires fully or not at all. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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