Fuel, Fatigue and Fibre Types · Muscles
Two personalities of muscle fibre, mixed in every muscle.
Some of your muscle fibres are built to contract fast and hard and quit within seconds. Others contract slowly, weakly, and can go for hours. You have both — mixed together in every muscle you own.
There's more: two personalities of muscle fibre, mixed in every muscle. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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