Set up for the one arm seated dumbbell curl by grabbing a flat bench or adjustable bench and placing a dumbbell at one end. If you're using an adjustable bench, adjust the back to a 90 degree angle.

Sit on the end of the bench with your feet out in front of you and your knees together.

Pick up the dumbbell off the floor with your weakest arm (for most people this will be the left) with your palm facing up.

Bend the arm slightly to take the tensioninto the bicep. This is the starting position for the exercise.

Keeping your back straight and your elbow tucked in at your side, slowly curl up the dumbbell up as far as possible.

Squeeze the bicep hard, and then slowly lower the weight back to the starting position.

Repeat for desired reps, and then repeat for the other arm.

Exercise Tips:

Keep the rep timing slow andcontrol the weight throughout the set.

Keep your elbow tucked in at your side, don't allow it to come forward as you move the weight. Only your forearm should move.