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The study revealed intriguing results. Incline curls, which allow for greater bicep stretch, resulted in more upper arm growth. Conversely, preacher curls, which position the arm frontally, led to increased development of the lower bicep. This contrasts with conventional wisdom, suggesting a hybrid approach combining both types may provide a fuller development.
To maximize bicep growth, experts recommend two unique exercises. Pro natural bodybuilder Alberto Nunes champions the reverse preacher curl, performed on a slightly reclined bench. This variant challenges the biceps effectively from a stretched position while maintaining stability.