Stronger

Preacher Curl Machine

Preacher Curl Machine demonstration

Category

isolation

Difficulty

beginner

Equipment

machine

Force Type

pull

How to Perform the Preacher Curl Machine

  1. Adjust the seat height so your upper arms rest comfortably on the preacher pad with your armpits snug against the top edge.
  2. Grip the handles with an underhand (supinated) grip.
  3. Start with your arms extended but not fully locked out, maintaining slight tension in the biceps.
  4. Curl the handles toward your shoulders by contracting your biceps.
  5. Squeeze your biceps hard at the top of the movement for a 1-2 second pause.
  6. Lower the weight slowly back to the starting position with control, taking 2-3 seconds on the descent.
  7. Avoid fully straightening your arms at the bottom to keep constant tension on the biceps and protect the elbow joints.
  8. Repeat for the desired number of repetitions.

Common Mistakes to Avoid

Lifting the elbows off the preacher pad during the curl

Keep your upper arms pressed firmly against the pad throughout the entire movement to isolate the biceps.

Fully extending the arms at the bottom

Maintain a slight bend at the bottom to protect the biceps tendon and keep tension on the muscle.

Using too heavy a weight and compensating with body movement

Choose a weight that allows strict form; the machine is designed for isolation, so cheating defeats the purpose.

Muscles Worked

Benefits

  • Eliminates cheating and momentum by bracing the arms against the pad, ensuring pure bicep isolation.
  • The machine provides a consistent resistance curve that matches the bicep's strength profile.
  • Safer for the joints than free-weight preacher curls since the machine controls the path of motion.

Pro Tips

  • Focus on a slow, controlled negative to maximize muscle fiber recruitment and growth.
  • Try using a slightly wider or narrower grip if the standard position feels uncomfortable on your wrists.
  • This exercise is ideal for finishing a bicep workout since it fully isolates the muscle.

Variations

Recommended Sets & Reps

Strength

4-5 sets of 3-5 reps at 80-90% 1RM

Hypertrophy

3-4 sets of 8-12 reps at 65-75% 1RM

Endurance

2-3 sets of 15-20 reps at 50-60% 1RM

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