📸 Proper Execution Form
what is this exercise?
Hammer curls are a biceps curl variation in which the palms are held neutral — facing each other, as if holding a hammer. This position places greater emphasis on the brachialis muscle (located beneath the biceps) and the forearm muscles. The result is thicker, more massive arms.
📋 Step by Step
Stand upright, dumbbells in hands at your sides, palms facing each other (neutral grip).
Elbows tucked to your sides — they do not move throughout the exercise.
Tighten your abs, chest lifted, shoulders back.
Curl the dumbbells toward your shoulders while maintaining a neutral grip throughout the movement.
At the top, briefly squeeze — no wrist rotation.
Slowly lower the dumbbells back down — control the negative phase.
💪 Muscle Activation
| Muscle | Activation Level |
|---|---|
| Brachialis muscle (brachialis) | ★★★★★ |
| Biceps brachii muscle (biceps brachii) | ★★★★☆ |
| Forearm flexor muscles (forearm flexors) | ★★★★☆ |
| Abductor pollicis longus (brachioradialis) | ★★★☆☆ |
⚠️ Most Common Mistakes
✅ Keep your torso stable — if you need to swing, the weight is too heavy.
✅ Palms should remain facing each other throughout the exercise — this is not a biceps curl.
✅ Slow, controlled movement — 2 sec up, 3 sec down.
✅ Elbows should remain tucked to your sides — do not let them move.
🔄 Variations
| Variation | Description |
|---|---|
| Easier Seated hammer curl | The seated position eliminates the possibility of body swinging. |
| Easier Alternating hammer curl | One arm at a time — more focus on each repetition. |
| Harder Cable rope hammer curl | With a cable rope — constant tension throughout the range of motion. |
| Harder Concentration hammer curl | Elbow resting on the thigh — maximum isolation. |
🔢 Sets and Reps
Hammer curl works the biceps and brachialis with a neutral grip:
- For muscle growth: 3–4 sets × 8–12 reps.
- For Arm Size: 4 sets × 10–12 reps, rest 60–90 sec.
- For Beginners: 2–3 sets × 10–12 reps with a moderate weight.
🛡️ Safety
- Elbows at your sides and do not move — do not twist your body.
- Neutral grip reduces wrist strain compared with a regular curl.
- Use full range of motion, but do not jerk the weight down.
- If your wrist hurts, this variation is often more comfortable — but reduce the weight.
🙋 Frequently Asked Questions
How is it different from a regular curl? A neutral grip (palms facing your body) engages the brachialis more and puts less strain on the wrist.
Dumbbells or barbell? Dumbbells make it easier to maintain a neutral grip and work both arms equally.
Can it be done seated? Yes, but standing makes it easier to keep your elbows at your sides.