Zottman Preacher Curl

Hold one dumbbell and position your upper arm on a preacher bench. Turn your palm up and curl the dumbbell up toward your shoulder. Keep your upper arm flat against the bench at all time! When you reach the top, rotate your wrist so that your palm faces almost straight down. Your thumb will be a little higher than your pinky. Go back to the starting position and repeat. You can also do these standing up