Exercise guide
Dumbbell Preacher Swing Curl
- Beginner
- Isolation
- Rep-based
- Upper arms
This exercise isolates the biceps by using the preacher bench to eliminate momentum, while the controlled arc ensures maximum tension at the peak contraction. It is highly effective for developing the biceps brachii and improving the 'peak' of the muscle.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Adjust the preacher bench height so your armpits rest comfortably against the top of the pad.
- Hold a dumbbell in one hand with an underhand (supinated) grip.
- Extend your arm fully across the pad, ensuring your triceps and the back of your upper arm are in full contact with the cushion.
- Plant your feet firmly on the ground and engage your core for stability.
How to do it
- Exhale as you curl the dumbbell upward in a smooth, controlled arc toward your shoulder, keeping your upper arm glued to the pad.
- Squeeze your biceps forcefully at the top of the movement, stopping just before the dumbbell is directly over your elbow to maintain tension.
- Inhale as you slowly lower the weight back to the starting position over a 2-3 second count.
- Stop the descent just before your elbow fully locks out to keep the muscle under constant load.
Form checklist
- Keep your armpit tucked tight against the top of the bench pad.
- Avoid leaning your torso back or using body momentum to lift the weight.
- Maintain a neutral wrist position; do not let the wrist curl excessively toward your forearm.
- Ensure the shoulder of the working arm stays down and retracted, not hunched forward.
Pro tips
- Rotate your pinky finger toward the ceiling at the top of the movement to maximize the peak contraction of the biceps.
- Focus on the mind-muscle connection by imagining you are squeezing a sponge between your forearm and bicep.
Make it harder
- Incorporate a 3-second pause at the top of each rep to increase time under tension.
- Perform 'slow eccentrics' by taking 5 seconds to lower the weight on every repetition.
Frequently asked
- What muscles does the dumbbell preacher swing curl work?
- The dumbbell preacher swing curl primarily targets the biceps, and also works the forearms as secondary muscles.
- What equipment do you need for the dumbbell preacher swing curl?
- The dumbbell preacher swing curl uses dumbbell.
- Is the dumbbell preacher swing curl good for beginners?
- Yes. The dumbbell preacher swing curl is a beginner-friendly movement and a strong foundation to build on.