Stand up with your torso upright while holding the E-Z Curl Bar at the closer inner handle. The palm of your hands should be facing forward. The elbows should be close to the body. This will be your starting position. While holding the upper arms stationary, curl the weights forward while contracting the biceps as you breathe out. Ensure that only the forearms should move. Continue the movement until your biceps are fully contracted and the bar is at shoulder level. Hold the contracted position for a second and squeeze the biceps hard. Slowly begin to bring the bar back to starting position as your breathe in. Repeat the movement till failure or close to failure. When you hold the bar with a narrower-than-shoulder-width grip, your arms turn in, which is known as internal rotation. The narrower your grip, the more internal rotation you have and the more involvement you have from the long head of the biceps which is important for building up peak.