Exercise Reference
Preacher Curl
The Preacher Curl is an isolation exercise that emphasizes elbow flexion while stabilizing the upper arms against an angled pad. By reducing body movement and momentum, the exercise helps increase focus on the elbow flexors, particularly the biceps brachii and brachialis. The controlled positioning used during the movement makes the Preacher Curl a popular exercise for improving arm development, exercise precision, and movement control.
The exercise is commonly performed using an EZ-curl bar, barbell, dumbbells, or machine variation and is also referred to as the Scott Curl. Because the upper arms remain supported throughout the movement, the exercise helps minimize compensatory shoulder and torso involvement compared to standing curl variations.
Joint Action and Muscles Involved
The primary joint action during the Preacher Curl is elbow flexion. During the lifting phase, the forearm moves upward toward the upper arm as the elbow angle decreases. The elbow flexors contract concentrically to raise the resistance and eccentrically to control the lowering phase of the movement.
The primary muscles involved are the biceps brachii and brachialis. The biceps brachii contributes significantly to elbow flexion and also assists with forearm supination, while the brachialis functions as a strong elbow flexor regardless of forearm position. The brachioradialis also assists during the movement and contributes to forearm stabilization and elbow flexion support.
Joint Action and Muscles Involved
The primary joint action during the Preacher Curl is elbow flexion. During the lifting phase, the forearm moves upward toward the upper arm as the elbow angle decreases. The elbow flexors contract concentrically to raise the resistance and eccentrically to control the lowering phase of the movement.
The primary muscles involved are the biceps brachii and brachialis. The biceps brachii contributes significantly to elbow flexion and also assists with forearm supination, while the brachialis functions as a strong elbow flexor regardless of forearm position. The brachioradialis also assists during the movement and contributes to forearm stabilization and elbow flexion support.
Video Demonstration
The Preacher Curl emphasizes controlled elbow flexion while minimizing momentum and upper body involvement. The following video demonstrates proper exercise execution, including upper arm positioning, movement control, and full range of motion during the exercise.
Exercise Tips
Upper Arm Stabilization Keep the upper arms firmly positioned against the preacher pad throughout the movement to reduce momentum and improve elbow flexor isolation.
Controlled Movement Speed Use controlled lifting and lowering phases to maintain muscle tension and improve movement efficiency during the exercise.
Avoid Excessive Weight Excessively heavy resistance may increase torso movement and reduce proper elbow flexor involvement during the curl.
Neutral Wrist Position Maintain neutral wrist alignment throughout the movement to help reduce unnecessary wrist strain and improve exercise control.
Controlled Eccentric Phase Slowly lowering the resistance helps maintain muscle engagement and improves control throughout the full range of motion.
Safety Considerations
The Preacher Curl is generally considered a safe elbow flexion exercise when performed with controlled movement and appropriate resistance. Maintaining proper upper arm positioning against the preacher pad helps reduce momentum and improve exercise control. Avoid excessively heavy weight, aggressive elbow extension at the bottom position, and unnecessary wrist movement to help reduce stress on the elbows and wrists during the exercise.
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