Diferencia clave
This is still a dumbbell biceps curl, but it is performed one arm at a time with the upper arm braced for stricter isolation. The setup reduces momentum more than the standing alternating version.
Cuándo elegirlo
Choose this when form control is the main priority or when one arm is noticeably stronger than the other. It is useful for lifters who tend to swing the dumbbells during standing curls and need a more constrained movement.