The correct performance of the exercise
Stand in front of the machine with a small lunge and your trunk slightly bent to the front. Put one forearm on the thigh to make the position more stable. Grab the grip with the other hand. Upper arm should be parallel to the ground, elbow bent to 90-100 degrees. With and inhale straighten your arm. Tighten triceps at the peak. Then go back to the basic position bending your arm.