Exercise guide
Dumbbell Prone Alternate Hammer Curl
- Beginner
- Isolation
- Rep-based
- Upper arms
This exercise isolates the brachialis and brachioradialis by using a chest-supported position to eliminate momentum and ensure a strict range of motion. The prone angle places unique tension on the long head of the biceps and the forearms.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Set an incline bench to approximately 45 degrees.
- Lie chest-down (prone) on the bench with your feet firmly on the floor or the bench's foot pegs for stability.
- Hold a dumbbell in each hand with a neutral grip (palms facing each other).
- Let your arms hang straight down toward the floor, fully extended and perpendicular to the ground.
How to do it
- Exhale and curl one dumbbell toward your shoulder while maintaining the neutral hammer grip.
- Squeeze the bicep and forearm at the top of the movement, ensuring your elbow stays fixed in place.
- Inhale and slowly lower the dumbbell back to the starting position using a controlled 3-second tempo.
- Repeat the movement with the opposite arm, alternating sides until the set is complete.
Form checklist
- Keep your chest in constant contact with the bench to prevent torso swinging.
- Maintain a neutral wrist; do not let the wrist curl or bend under the weight.
- Keep your elbows pinned in a vertical line; do not let them drift forward during the curl.
- Achieve a full stretch at the bottom of every rep before starting the next side.
Pro tips
- Squeeze the dumbbell handle as hard as possible to maximize neural drive and forearm engagement.
- Focus on the 'peak contraction' at the top by trying to bring your thumb as close to your shoulder as possible without moving the elbow.
Make it harder
- Add a 2-second isometric hold at the top of each repetition.
- Slow down the eccentric (lowering) phase to 4-5 seconds to increase time under tension.
Frequently asked
- What muscles does the dumbbell prone alternate hammer curl work?
- The dumbbell prone alternate hammer curl primarily targets the biceps, and also works the forearms as secondary muscles.
- What equipment do you need for the dumbbell prone alternate hammer curl?
- The dumbbell prone alternate hammer curl uses dumbbell.
- Is the dumbbell prone alternate hammer curl good for beginners?
- Yes. The dumbbell prone alternate hammer curl is a beginner-friendly movement and a strong foundation to build on.