Preacher Curl Machine

The targeted muscle is the brachialis, and because the arms are placed at an angle when engaged in a preacher curl, the exercise works the long head of the biceps brachii muscles more than the short head.The preacher curl and bicep curl are extremely similar exercises, but they do have some differences. A preacher curl is a variation of the traditional bicep curl, however the exercise isolates the bicep muscles by being performed in a seated position, using a slanted Preacher Curl Bench for support.While a spider curl has your stomach down on an incline bench, a preacher curl has you sit at a preacher curl bench with the backs of your arms resting on the arm pad. The difference in form between the two moves results in a big difference in how the biceps work.