Dumbbell Seated Reverse Grip One Arm Overhead Tricep Extension

Sit upright on a bench with a straight back and hold a dumbbell in one hand using a reverse (underhand) grip. Raise your arm overhead so your elbow is close to your ear and your upper arm stays vertical. Slowly bend your elbow to lower the dumbbell behind your head while keeping your upper arm fixed and stable. Pause briefly at the bottom, then extend your arm back up by contracting your triceps until fully straight. Keep your core tight, avoid arching your lower back, and perform the movement in a slow, controlled manner.

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