Analysis Version
v1
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causal
Analysis v1
Supported

Doing bicep curls on an incline bench builds more muscle in the upper part of your biceps than preacher curls do.

49
Pro
47
Against

Evidence from Studies

Supporting (2)

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Community contributions welcome

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Distinct muscle growth and strength adaptations after preacher and incline biceps curls

Randomized Controlled Trial
Human
2025 May

The study found that incline biceps curls build more muscle at the top of the biceps compared to preacher curls, which matches what the claim says.

49

Distinct muscle growth and strength adaptations after preacher and incline biceps curls

Randomized Controlled Trial
Human
2025 May

The study shows that incline curls build more muscle at the top part of the biceps compared to preacher curls, which matches what the claim says.

Contradicting (1)

47

Community contributions welcome

47

Regional Hypertrophy: The Effect of Exercises at Long and Short Muscle Lengths in Recreationally Trained Women

Randomized Controlled Trial
Human
2023 Jul

The study found that incline curls didn’t make the biceps grow more, but preacher curls did—especially near the elbow. This goes against the idea that incline curls are better for biceps growth.

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.

Similar Assertions

Doing bicep curls on an incline bench might build your biceps muscle better than doing preacher curls, especially in the middle part of your upper arm.

49
0
91%

Whether you use a cable machine or a barbell to do preacher curls for 10 weeks, your biceps will grow about the same amount — the exact way you apply resistance doesn’t matter much for muscle size.

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0
84%

Doing preacher curls might build more muscle in a specific lower part of your upper arm than incline curls do.

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0
82%

If young women do incline bicep curls twice a week for 8 weeks, they’ll get stronger at that exact move compared to doing preacher curls — it’s like getting better at one exercise by practicing that one specifically.

49
0
81%

For guys new to lifting, doing bicep curls with your arms in front of your body works just as well for building arm muscle as doing them with your arms behind you — both give about the same 6% to 9% growth in 10 weeks.

47
0
81%

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