Preacher Curl with Dumbbell

The Dumbbell Curl on the Scott Bench, also referred to as the Preacher Curl with Dumbbell, is a popular exercise in strength training, primarily focusing on the development of the upper arm muscles. It's a single-joint exercise, meaning it involves movement around only one joint. This post will dig into the execution, variants, and the muscles involved in this exercise, providing a comprehensive understanding of its dynamics.

Execution of the Exercise

To perform the Dumbbell Curl on the Scott Bench, one must follow these steps:

  1. Starting Position: Stand with your knees slightly bent and your feet shoulder-width apart. Place one foot slightly in front of the other and align the shoulder of your forward foot with the top edge of the bench. Rest your arm on the bench with your elbow extended and your palm facing up. Ensure your wrist is straight or slightly flexed.
  2. Movement: Flex your elbow to lift the dumbbell, keeping the rest of your body stationary. Stop just before the dumbbell is vertical above your elbow. It's important to keep your arm on the bench throughout the exercise to maintain proper form.
  3. Contraction: Emphasize the isometric contraction at the end of the concentric movement to increase the involvement of the brachialis muscle.

Remember to follow these steps for both arms, mirroring the movement with your other arm.

Exercise Variants

While the Supination Dumbbell Curl on the Scott Bench is a highly effective exercise, there are several other variants that can be incorporated into your exercise regimen to add diversity and challenge different aspects of the biceps and supporting muscles. Here are a few notable variants:

  1. Hammer Curl on Scott Bench: This variant involves using dumbbells in a neutral grip, resembling a hammer. The exercise targets not only the biceps but also the brachialis and the brachioradialis, contributing to overall arm thickness and forearm strength. The Scott Bench ensures the muscles are isolated for maximum engagement.
  2. Reverse Grip Barbell Curl on Scott Bench: By adopting a reverse grip (palms facing down), this variant shifts more focus onto the brachioradialis and extensor muscles of the forearm. It's an excellent way to enhance grip strength and develop the outer forearm, providing a well-rounded arm workout.
  3. Cable Curl with Scott Bench: Using a cable machine instead of free weights adds a constant tension throughout the exercise, offering a unique stimulus to the biceps. The cable's continuous resistance can lead to heightened muscle activation, especially at the peak contraction point.
  4. Incline Dumbbell Curl on Scott Bench: Although more challenging to set up, performing dumbbell curls while lying face down on an inclined Scott Bench can alter the angle of the exercise, putting the biceps under tension from a stretched position. This variant can help target the long head of the biceps more effectively.
  5. Zottman Curl on Scott Bench: This involves curling the dumbbells up with a supinated grip (palms facing up) and then rotating the wrists at the top so that you lower the dumbbells with a pronated grip (palms facing down). This combination movement effectively works both the biceps and the forearm muscles in a single exercise.

Muscles Involved

The Supination Dumbbell Curl on the Scott Bench engages several muscles, primarily in the upper arm. Here are the key muscles involved:

  • Biceps Brachii: This muscle is located in the upper arm and is responsible for elbow flexion.

  • Brachioradialis: Located in the forearm, this muscle assists in the flexion of the elbow.

  • Brachialis: This muscle lies underneath the biceps brachii and is a primary mover in elbow flexion.

The function of these muscles is to provide stability to the shoulder, elbow, and grip while performing the exercise. Additionally, they also contribute to the stability of the torso, hip, knee, ankle, and foot.


The Supination Dumbbell Curl on the Scott Bench is a versatile and effective exercise for upper arm development. By understanding the execution, muscle involvement, and variants of this exercise, you can incorporate it into your workout routine in a way that best suits your fitness goals. Always remember to maintain proper form during execution to maximize muscle engagement and prevent injury.

Article Disclaimer