Changing the angle of your shoulder while doing bicep curls makes your biceps work harder during the workout, even if you're lifting the same total weight.

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Evidence from Studies

Supporting (1)

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The Effects of Varying Glenohumeral Joint Angle on Acute Volume Load, Muscle Activation, Swelling, and Echo-Intensity on the Biceps Brachii in Resistance-Trained Individuals

Randomized Controlled Trial

Human

2019 Sep 4

Changing the angle of your shoulder while doing bicep curls made your biceps work harder—without lifting more weight or doing more reps—so your muscles get a bigger challenge just by moving differently.

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No contradicting evidence found

Source Study

The Effects of Varying Glenohumeral Joint Angle on Acute Volume Load, Muscle Activation, Swelling, and Echo-Intensity on the Biceps Brachii in Resistance-Trained Individuals

Score: 51

DOI: 10.3390/sports7090204

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Switching up your shoulder position during bicep curls makes your muscles fire more, even if you're lifting the same total weight.

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