What you'll gain

• Builds the lower portion of the biceps through strict elbow isolation.

• Removes momentum and shoulder swing from the curl entirely.

• Trains each arm independently, fixing left-right strength imbalances.

Step-by-Step Instructions

1. 1

   Set up at a preacher bench with a single dumbbell ready and the seat adjusted so the armpit sits at the top of the pad.

2. 2

   Sit down and press the back of the upper arm flat against the angled pad, gripping the dumbbell with the palm up.

3. 3

   Let the arm extend almost fully at the bottom but stop just shy of full lockout to keep tension on the biceps.

4. 4

   Curl the dumbbell up by bending only at the elbow, keeping the upper arm glued to the pad.

5. 5

   Squeeze the biceps hard at the top with the dumbbell near shoulder height, pausing briefly.

6. 6

   Lower the dumbbell under control over 2 to 3 seconds back to the near-extended start position.

Common Mistakes

• Lifting the upper arm off the pad mid-rep, which kills the strict isolation the bench enforces.

• Locking the elbow fully at the bottom under load, which strains the joint and removes muscle tension.

• Dropping the dumbbell back down quickly, missing the lower-biceps stretch where most of the growth lives.

• Loading too heavy, which forces the pad-arm to lift and turns the curl into a swinging cheat rep.

About This Exercise

The dumbbell preacher curl is a single-arm biceps curl performed with the upper arm pressed flat against an angled preacher pad. The pad takes momentum and shoulder swing fully out of the lift, which makes it one of the strictest biceps isolations available — and it specifically biases the lower portion of the biceps near the elbow. For app and content use, this is a hypertrophy specialist for any serious arm program. Ship it in dedicated arm-day blocks, pull-day finisher slots, and aesthetic-focused tracks that want a complete biceps curriculum. It's also a clean teaching piece for beginners learning what strict elbow isolation should feel like, since the pad does most of the form-enforcing work for the user.

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