For biceps growth
For biceps growth, barbell curl rates higher on our research criteria: easier to progress.
Concentration curl is easier on the joints.
Both are good choices that train the biceps the same way, so they swap freely. Rotating between them every few weeks is an easy way to vary your training.
The research score comes from these, scored by hand from the studies. Lifter scores appear once an exercise has 10 ratings. How scores work
Barbell Curl. The classic heavy curl and easy to load, but the biceps are barely stretched at the bottom.
Concentration Curl. Bracing the arm on the thigh stops any cheating, but the bottom is light and dumbbells jump in big steps.
For biceps growth, barbell curl rates higher on our research criteria: easier to progress. Concentration curl is easier on the joints. Both are good choices that train the biceps the same way, so they swap freely. Rotating between them every few weeks is an easy way to vary your training.
About the same: both are easy to learn.
Barbell curl needs a barbell, so for most people it’s a gym exercise. Concentration curl needs dumbbells and a bench, so a home gym covers it.
Concentration curl: it rates Excellent for joint and recovery cost in our research rubric, against Strong for barbell curl.