Get into the starting position for the standing one arm dumbbell extension by grasping a dumbbell in your left hand and holding it above your head with your palm facing forward.

Your elbow should be slightly bent.You can use your right arm to stabilize your body.

Begin the movement by bending at the elbow only and slowly lowering the dumbbell behind your neck.

Once the dumbbell is down as far as possible, slowly raise it back to the starting position.

Do not lock your elbow out at the top of the movement, and then repeat for desired reps.

Exercise Tips:

Use a long range of motion and do not lock your elbow out at the top of the movement.

Keep your upper arms as still as possible, allowing your forearms to drive the movement.