As you bend your elbow more and more, your forearm muscle gets looser — no matter if your palm is up, down, or sideways.

34

Pro

0

Against

Evidence from Studies

Supporting (1)

34

Community contributions welcome

34

Forearm rotation and elbow angle differentially modulate biceps brachii and brachioradialis muscle stiffness and EMG activity during low-load isometric contractions: a cross-sectional study in healthy individuals

Cross-Sectional Study

Human

2025 Jul 2

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Forearm rotation and elbow angle differentially modulate biceps brachii and brachioradialis muscle stiffness and EMG activity during low-load isometric contractions: a cross-sectional study in healthy individuals

Score: 34

DOI: 10.1186/s13102-025-01226-y

Similar Assertions

No matter how you turn your hand, the muscle on the outside of your forearm gets less stiff the more you bend your elbow.

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Even when you're not trying to bend your elbow, the muscle on the outside of your forearm feels stiffer if your palm is facing up than if it's facing down or straight ahead.

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No matter how you turn your hand while bending your elbow, the brachioradialis muscle works about the same amount.

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When your palm is facing down and you bend your elbow slightly, your forearm muscle (brachioradialis) works harder than when your palm is up — it’s like your body uses this muscle more to help when your hand is in a 'handshake' position.

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When you bend your elbow by lifting something, the brachioradialis muscle works much harder pushing up than it does lowering the weight slowly.

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