"Incline curls" refers to a type of exercise where you curl or lift weights while lying at an angle on an inclined bench, helping to target and strengthen your biceps muscles. Full definition
Using exercises that maximise muscle activity at the peak contraction, such as standing curls, alongside exercises that maximise muscle activity at the stretch position, such as seated incline curls and preacher curls may maximise biceps hypertrophy. (strengthandconditioningresearch.com)
The greatest biceps muscle activity was reported in the dumbbell and incline curl displayed in the final 1/3 of the movement with the arm fully flexed. (strengthandconditioningresearch.com)
Exercises such as incline curls and drag curls (where the upper arm is positioned behind the torso) place more emphasis on the long head of the biceps. (ptinto.com)