The fitness arm curl preacher bench is a piece of equipment designed to specifically target and isolate the biceps muscles during arm curl exercises. The bench typically has a padded surface to support the arms and a barbell or dumbbell rest for performing curls. To use the arm curl preacher bench, follow these steps: 1. Adjust the seat height and angle of the bench to ensure proper alignment of your arms and elbows. 2. Sit on the bench with your chest against the pad and your arms extended over the barbell or dumbbell rest. 3. Grasp the barbell or dumbbells with an underhand grip, palms facing up. 4. Keeping your upper arms stationary, exhale as you curl the weight towards your shoulders, contracting your biceps. 5. Pause at the top of the movement and squeeze your biceps before slowly lowering the weight back down to the starting position. 6. Repeat for the desired number of repetitions. It is important to use proper form and technique when using the arm curl preacher bench to avoid injury and maximize the effectiveness of the exercise. Start with a lighter weight and gradually increase as needed to challenge your muscles.