Body Atlas

Muscles and Bones · Muscles

Why does lifting a small weight need so much muscle force?

Your body trades force for speed — deliberately.

The simple answer

Your biceps attaches to the forearm very close to the elbow. That's a terrible position for lifting — it means the muscle must generate several times the force of whatever you're actually holding.

Go deeper

There's more: your body trades force for speed — deliberately. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.

Explore this concept in Body Atlas →

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