Dumbbell Prone Alternate Hammer Curl
- Músculo objetivo
- —
- Equipamiento
- Dumbbell
- Parte del cuerpo
- Forearms
- Tipo
- Strength
The dumbbell prone alternate hammer curl is an isolation exercise for the elbow flexors, working the forearm muscles and the brachioradialis with the neutral, palms-facing grip that defines a hammer curl. Lying face-down on an incline bench removes momentum and locks your upper arms in place, so each alternating rep is driven purely by the flexors. It is a strict accessory move for building forearm thickness and arm-flexion strength.
Cómo hacer el Dumbbell Prone Alternate Hammer Curl
- 1Set an incline bench to roughly 45° and lie face-down (prone) on the pad with your chest supported and your feet braced on the floor.
- 2Hold a dumbbell in each hand with a neutral grip, palms facing each other, and let your arms hang straight down toward the floor.
- 3Keep your upper arms still and your shoulders pulled back, taking the slack out so the weight is supported by your forearms.
- 4Curl one dumbbell up toward your shoulder by bending the elbow, keeping your wrist neutral and your thumb pointing up throughout.
- 5Squeeze the forearm flexors hard at the top, holding the dumbbell just short of your shoulder for a brief pause.
- 6Lower the dumbbell under control back to the fully extended starting position without letting your upper arm swing.
- 7Repeat with the opposite arm, alternating sides for the full set.
- 8Once all reps are complete, lower both dumbbells under control and set them down.
Consejos de técnica
- Keep your wrists locked in the neutral hammer position for the whole rep — the knuckles stay vertical, the thumbs point up.
- Pin your upper arms against your sides and let only the elbow joint move, so the forearms do the work instead of your shoulders.
- Lower each dumbbell slowly over two to three seconds; the controlled negative is where much of the forearm growth happens.
- Pick a weight you can curl strictly — the prone position deliberately strips out the body english that lets you cheat heavier loads.
Errores comunes
- Swinging the dumbbells up with momentum, which shifts the load off the forearms and defeats the purpose of the prone, supported position.
- Letting the wrist roll or break out of neutral, turning it into a regular curl and reducing the brachioradialis emphasis the hammer grip provides.
- Lifting the chest off the pad to heave the weight up, which removes the support that makes this movement strict and risks lower-back strain.
- Going too heavy and only doing a partial range, cutting the rep short instead of fully extending and fully flexing each arm.
Preguntas frecuentes
What muscles does the dumbbell prone alternate hammer curl work?
It targets the elbow flexors of the forearm, with the neutral hammer grip placing extra emphasis on the brachioradialis. The prone bench support isolates these muscles by removing momentum from the rest of the body.
Why do it prone on a bench instead of standing?
Lying face-down braces your torso and fixes your upper arms, so you can't swing or use body english. That forces the forearm flexors to move the weight through a strict range, making it a cleaner isolation exercise than a standing hammer curl.
How is a hammer curl different from a regular curl?
A hammer curl uses a neutral grip with the palms facing each other rather than a supinated, palms-up grip. That neutral position shifts more of the work onto the brachioradialis and forearm, building arm thickness.
How many sets and reps should I do?
As a forearm accessory, three to four sets of 10–15 reps per arm works well. Keep the weight strict and controlled rather than chasing heavier loads with looser form.
Is the prone alternate hammer curl good for beginners?
Yes. The bench support makes it one of the harder curl variations to cheat on, so beginners learn strict elbow flexion. Start light to groove the neutral wrist position before adding weight.
