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StrengthBeginner
One Arm Dumbbell Preacher Curl
Equipment
Dumbbell
Target Muscles
Biceps
Category
Strength
Muscle Group
Arms
Force Type
pull
Mechanics
isolation
Target Muscles
Biceps
Breathing
Exhale as you pull the weight toward your body, inhale as you extend back to the start.
Common Mistakes
- •Using momentum instead of controlled muscle tension
- •Not maintaining proper form throughout the movement
- •Rushing through reps instead of using a controlled tempo
Safety Tips
- •Maintain proper posture and alignment throughout the movement
- •Use a spotter or safety racks when lifting heavy
- •Always warm up properly before attempting this exercise
Variations
- •Perform one arm at a time to fix strength imbalances
- •Try a neutral grip to reduce shoulder strain
- •Increase the range of motion by using a bench that allows a deeper stretch
Alternatives
- •Choose another exercise that targets the biceps
Progressions
- •Master the basic form with bodyweight before adding external load
- •Increase the weight by 5-10% once you can complete all reps with clean form
- •Slow down the eccentric (lowering) phase to 3-4 seconds
- •Reduce rest periods between sets to increase workout density
- •Add an extra set or rep each week (progressive overload)
- •Try the same exercise with a barbell instead of dumbbells to handle heavier loads
Regressions
- •Reduce the weight to focus strictly on technique
- •Decrease the range of motion if you feel joint discomfort
- •Increase rest intervals to ensure full recovery between sets
- •Perform with just the bar or light dumbbells to groove the movement pattern
Beginner Tips
- •Master proper form before increasing weight
- •Focus on slow, controlled movements — don't chase speed
- •Start with 2-3 sets of 10-12 reps to build a solid foundation
- •Record yourself to check your form
Pro Tips
- Focus on the mind-muscle connection — consciously squeeze the target muscle at the peak of each rep
- Use a 2-1-3 tempo (2 seconds up, 1 second pause, 3 seconds down) to maximise time under tension
- Implement progressive overload by tracking every session and adding small increments