Exercise guide
Barbell Curl
Learn how to use barbell curl in training, choose practical loads, avoid common mistakes, and track progress in RackMath.
At a glance
How to use this lift in training.
Position and movement cues
- Grip
- Use a shoulder-width underhand grip. Keep wrists mostly neutral instead of letting them collapse back.
- Feet
- Stand balanced with feet around hip width.
- Back and chest
- Keep chest tall, ribs controlled, and upper arms close to the torso.
- Range of motion
- Curl from straight or nearly straight elbows to a strong top contraction without the shoulders taking over.
- Speed
- Lift smoothly and lower under control. The lowering half should not be a drop.
- Elbows and knees
- Keep elbows near the sides and knees still. Do not dip the knees to start reps.
Common mistakes
- Swinging the hips
- Letting elbows drift far forward
- Cutting the lower half short
- Using wrist extension to finish
How to practice it
Start each set by finding the same setup: stable feet, balanced grip or handles, a braced trunk, and a repeatable start position. Stop the set when the lift no longer looks like the first good rep.
For a heavy barbell lift, use the empty bar, then a few smaller jumps before your working weight. For dumbbells or machines, use one or two lighter feeler sets.
Loading and progression
Use 3-6 reps for strength practice, 6-12 reps for most muscle-building work, and 10-15+ reps for lighter accessories or skill practice.
Pick a load that feels like RPE 7-8 on the final set. Add weight only when the target reps, range of motion, and positions stay consistent.
Track it in RackMath
RackMath keeps previous weights, reps, RPE, plates, warmups, and PRs connected to the exercise so the next session starts with context.
Plate examples
Common barbell loading examples.
Use these as quick references. For custom plates, collars, kg plates, or specialty bars, use the RackMath plate calculator.
| Target | 45 lb bar setup |
|---|---|
| 45 lb | empty bar |
| 65 lb | 10 per side |
| 75 lb | 15 per side |
| 95 lb | 25 per side |
Ready to track it?