Exercise guide
Dumbbell Preacher Curl Over Exercise Ball
- Intermediate
- Isolation
- Rep-based
- Upper arms
This isolation exercise uses a stability ball to mimic a preacher bench, effectively locking the upper arm in place to eliminate momentum and maximize bicep tension. It provides a unique angle that emphasizes the peak of the bicep and ensures a deep stretch at the bottom of the movement.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Kneel on the floor behind a stability ball with a dumbbell in one hand.
- Lean forward and drape your working arm over the ball so your triceps and the back of your arm are fully supported by the curve.
- Position your armpit snugly against the top of the ball to prevent the arm from shifting during the set.
- Place your non-working hand on the ball or your hip for added stability.
How to do it
- Start with your arm fully extended and your palm facing upward (supinated).
- Exhale and curl the dumbbell toward your shoulder by contracting your bicep, keeping your upper arm pressed firmly into the ball.
- Pause and squeeze the bicep hard at the top of the movement for one second.
- Inhale and slowly lower the dumbbell back to the starting position using a controlled 3-second eccentric tempo.
Form checklist
- Keep your upper arm and elbow glued to the ball throughout the entire range of motion.
- Avoid rocking your torso back or using momentum to swing the weight up.
- Maintain a neutral, strong wrist to ensure the bicep does the work rather than the forearm.
- Keep your chest pressed into the ball to maintain a stable anchor point.
Pro tips
- Focus on driving your elbow into the ball as you curl to better isolate the bicep and prevent shoulder involvement.
- Keep your shoulder blades retracted and down to prevent your shoulder from rounding forward at the bottom of the rep.
Make it harder
- Add a 2-second pause at the bottom of the movement to eliminate the stretch reflex and increase difficulty.
- Slow the lowering phase (eccentric) to 5 seconds to maximize time under tension.
Frequently asked
- What muscles does the dumbbell preacher curl over exercise ball work?
- The dumbbell preacher curl over exercise ball primarily targets the biceps.
- What equipment do you need for the dumbbell preacher curl over exercise ball?
- The dumbbell preacher curl over exercise ball uses dumbbell.
- Is the dumbbell preacher curl over exercise ball good for beginners?
- The dumbbell preacher curl over exercise ball is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.