A unilateral isolation arm exercise performed with dumbbells, where each rep is curled across the body toward the opposite shoulder using a neutral (hammer) grip. The movement involves flexing the elbow while keeping the upper arm close to the torso and minimizing shoulder movement. The diagonal curl path increases tension on the brachialis and forearm muscles, and the exercise is completed with a slow, controlled lowering phase to maintain constant engagement throughout the range of motion.
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