Sit at a preacher bench with feet shoulder-width apart, holding a dumbbell in one hand.
Curl the dumbbell towards your shoulder.
Lower the dumbbell back to the starting position. Repeat on the other side.
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About this exercise : Single-arm preacher curls with a dumbbell for focused bicep isolation. This exercise is great for correcting imbalances and ensuring equal muscle development. The preacher bench helps in maintaining proper form and control.