Barbell Curl
The Barbell Curl is a foundational isolation exercise that primarily targets the biceps brachii using a straight barbell to build arm size and strength. It involves flexing the elbow against resistance in a standing position, placing significant load on the biceps and forearms.
Iridium tracks the cumulative fatigue on your biceps from recent compound pulling movements in your 7-day history to determine if you have sufficient recovery capacity for heavy direct arm work. The AI adjusts the total set volume for Barbell Curls to ensure this accessory lift contributes to your Minimum Effective Volume without pushing you past your Maximum Recoverable Volume.
Form Cues
- Stand tall with your feet shoulder-width apart and core braced
- Keep your elbows pinned to your sides throughout the movement
- Squeeze your biceps hard at the top of the curl
- Lower the bar slowly under control, taking 2-3 seconds
- Keep your wrists neutral to avoid excessive strain
- Don't swing your hips or lean back to hoist the weight up
- Don't let your elbows drift forward away from your body
- Don't cut the range of motion short at the bottom
- Don't shrug your shoulders up towards your ears
Common Mistakes
- Using excessive momentum to cheat the rep
- Flaring the elbows out to the sides
- Performing partial reps
- Hyperextending the lower back
- Curling the wrists excessively at the top
Muscles Worked
This exercise is the gold standard for targeting the entire biceps brachii, working both the short and long heads to improve peak and thickness. It also heavily recruits the brachialis and the forearm flexors to stabilize the heavy load during the lifting phase.
Primary
Secondary
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